There is a race between reset and the transmit paths that can lead to
ibmvnic_xmit() accessing an scrq after it has been freed in the reset
path. It can result in a crash like:
The immediate cause of the crash is the access of tx_scrq in the following
snippet during a reset, where the tx_scrq can be either NULL or an address
that will soon be invalid:
But beyond that, the call to ibmvnic_xmit() itself is not safe during a
reset and the reset path attempts to avoid this by stopping the queue in
ibmvnic_cleanup(). However just after the queue was stopped, an in-flight
ibmvnic_complete_tx() could have restarted the queue even as the reset is
progressing.
Since the queue was restarted we could get a call to ibmvnic_xmit() which
can then access the bad tx_scrq (or other fields).
We cannot however simply have ibmvnic_complete_tx() check the ->resetting
bit and skip starting the queue. This can race at the "back-end" of a good
reset which just restarted the queue but has not cleared the ->resetting
bit yet. If we skip restarting the queue due to ->resetting being true,
the queue would remain stopped indefinitely potentially leading to transmit
timeouts.
IOW ->resetting is too broad for this purpose. Instead use a new flag
that indicates whether or not the queues are active. Only the open/
reset paths control when the queues are active. ibmvnic_complete_tx()
and others wake up the queue only if the queue is marked active.
So we will have:
A. reset/open thread in ibmvnic_cleanup() and __ibmvnic_open()
To ensure that ->tx_queues_active and state of the queues are consistent,
we need a lock which:
- must also be taken in the interrupt path (ibmvnic_complete_tx())
- shared across the multiple queues in the adapter (so they don't
become serialized)
Use rcu_read_lock() and have the reset thread synchronize_rcu() after
updating the ->tx_queues_active state.
While here, consolidate a few boolean fields in ibmvnic_adapter for
better alignment.
Based on discussions with Brian King and Dany Madden.
Fixes: 1fe0248e0a0d ("net/ibmvnic: prevent more than one thread from running in reset") Reported-by: Vaishnavi Bhat <vaish123@in.ibm.com> Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
bareudp_create_sock() use AF_INET6 by default if IPv6 CONFIG enabled.
But if user start kernel with ipv6.disable=1, the bareudp sock will
created failed, which cause the interface open failed even with ethertype
ip. e.g.
# ip link add bareudp1 type bareudp dstport 2 ethertype ip
# ip link set bareudp1 up
RTNETLINK answers: Address family not supported by protocol
Fix it by using ipv6_mod_enabled() to check if IPv6 enabled. There is
no need to check IS_ENABLED(CONFIG_IPV6) as ipv6_mod_enabled() will
return false when CONFIG_IPV6 no enabled in include/linux/ipv6.h.
Reported-by: Jianlin Shi <jishi@redhat.com> Fixes: ed095d08e6ed ("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Link: https://lore.kernel.org/r/20220315062618.156230-1-liuhangbin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
When providing the MSG_TRUNC flag via recvmsg() syscall the return value
provides the real length of the packet or datagram, even when it was longer
than the passed buffer.
When reading from an unbound can-isotp socket the syscall blocked
indefinitely. As unbound sockets (without given CAN address information)
do not make sense anyway we directly return -EADDRNOTAVAIL on read()
analogue to the known behavior from sendmsg().
Syzbot created an environment that lead to a state machine status that
can not be reached with a compliant CAN ID address configuration.
The provided address information consisted of CAN ID 0x6000001 and 0xC28001
which both boil down to 11 bit CAN IDs 0x001 in sending and receiving.
Sanitize the SFF/EFF CAN ID values before performing the address checks.
Fixes: 3f9425168a78 ("can: add ISO 15765-2:2016 transport protocol") Link: https://lore.kernel.org/all/20220316164258.54155-1-socketcan@hartkopp.net Reported-by: syzbot+2339c27f5c66c652843e@syzkaller.appspotmail.com Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 6b922f735843 ("drm/i915/edp: Ignore short pulse when panel
powered off") completely broke short pulse handling for eDP as it is
usually generated by sink when it is displaying image and there is
some error or status that source needs to handle.
When power panel is enabled, this state is enough to power aux
transactions and VDD override is disabled, so intel_pps_have_power()
is always returning false causing short pulses to be ignored.
So here better naming this function that intends to check if aux
lines are powered to avoid the endless cycle mentioned in the commit
being fixed and fixing the check for what it is intended.
v2:
- renamed to intel_pps_have_panel_power_or_vdd()
- fixed indentation
Fixes: 6b922f735843 ("drm/i915/edp: Ignore short pulse when panel powered off") Cc: Anshuman Gupta <anshuman.gupta@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220311185149.110527-1-jose.souza@intel.com
(cherry picked from commit 1148a479a9dacac9c65002f84461c005b4e66703) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
The rts51x_read_mem() function should return negative error codes.
Currently if the kmalloc() fails it returns USB_STOR_TRANSPORT_ERROR (3)
which is treated as success by the callers.
Fixes: 054aef4a0919 ("ums_realtek: do not use stack memory for DMA") Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Link: https://lore.kernel.org/r/20220304073504.GA26464@kili Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
When running xdpsock for a fix duration of time before terminating
using --duration=<n>, there is a race condition that may cause xdpsock
to terminate immediately.
When running for a fixed duration of time the check to determine when to
terminate execution is in is_benchmark_done() and is being executed in
the context of the poller thread,
if (opt_duration > 0) {
unsigned long dt = (get_nsecs() - start_time);
if (dt >= opt_duration)
benchmark_done = true;
}
However start_time is only set after the poller thread have been
created. This leaves a small window when the poller thread is starting
and calls is_benchmark_done() for the first time that start_time is not
yet set. In that case start_time have its initial value of 0 and the
duration check fails as it do not correlate correctly for the
applications start time and immediately sets benchmark_done which in
turn terminates the xdpsock application.
Fix this by setting start_time before creating the poller thread.
Fixes: e7f6e63be8a9 ("samples/bpf: xdpsock: Add duration option to specify how long to run") Signed-off-by: Niklas Söderlund <niklas.soderlund@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220315102948.466436-1-niklas.soderlund@corigine.com Signed-off-by: Sasha Levin <sashal@kernel.org>
The mem of msg has been uncharged in tcp_bpf_send_verdict() by
sk_msg_return(), and would be uncharged by sk_msg_free() again. When psock
is null, we can simply returning an error code, this would then trigger
the sk_msg_free_nocharge in the error path of __SK_REDIRECT and would have
the side effect of throwing an error up to user space. This would be a
slight change in behavior from user side but would look the same as an
error if the redirect on the socket threw an error.
This issue can cause the following info:
WARNING: CPU: 0 PID: 2136 at net/ipv4/af_inet.c:155 inet_sock_destruct+0x13c/0x260
Call Trace:
<TASK>
__sk_destruct+0x24/0x1f0
sk_psock_destroy+0x19b/0x1c0
process_one_work+0x1b3/0x3c0
worker_thread+0x30/0x350
? process_one_work+0x3c0/0x3c0
kthread+0xe6/0x110
? kthread_complete_and_exit+0x20/0x20
ret_from_fork+0x22/0x30
</TASK>
Fixes: 38506f4bbc9d ("bpf, sockmap: convert to generic sk_msg interface") Signed-off-by: Wang Yufen <wangyufen@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Link: https://lore.kernel.org/bpf/20220304081145.2037182-5-wangyufen@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
If tcp_bpf_sendmsg() is running while sk msg is full. When sk_msg_alloc()
returns -ENOMEM error, tcp_bpf_sendmsg() goes to wait_for_memory. If partial
memory has been alloced by sk_msg_alloc(), that is, msg_tx->sg.size is
greater than osize after sk_msg_alloc(), memleak occurs. To fix we use
sk_msg_trim() to release the allocated memory, then goto wait for memory.
Other call paths of sk_msg_alloc() have the similar issue, such as
tls_sw_sendmsg(), so handle sk_msg_trim logic inside sk_msg_alloc(),
as Cong Wang suggested.
This issue can cause the following info:
WARNING: CPU: 3 PID: 7950 at net/core/stream.c:208 sk_stream_kill_queues+0xd4/0x1a0
Call Trace:
<TASK>
inet_csk_destroy_sock+0x55/0x110
__tcp_close+0x279/0x470
tcp_close+0x1f/0x60
inet_release+0x3f/0x80
__sock_release+0x3d/0xb0
sock_close+0x11/0x20
__fput+0x92/0x250
task_work_run+0x6a/0xa0
do_exit+0x33b/0xb60
do_group_exit+0x2f/0xa0
get_signal+0xb6/0x950
arch_do_signal_or_restart+0xac/0x2a0
exit_to_user_mode_prepare+0xa9/0x200
syscall_exit_to_user_mode+0x12/0x30
do_syscall_64+0x46/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xae
</TASK>
While drop_sk_msg(), the msg has charged memory form sk by sk_mem_charge
and has sg pages need to put. To fix we use sk_msg_free() and then kfee()
msg.
This issue can cause the following info:
WARNING: CPU: 0 PID: 9202 at net/core/stream.c:205 sk_stream_kill_queues+0xc8/0xe0
Call Trace:
<IRQ>
inet_csk_destroy_sock+0x55/0x110
tcp_rcv_state_process+0xe5f/0xe90
? sk_filter_trim_cap+0x10d/0x230
? tcp_v4_do_rcv+0x161/0x250
tcp_v4_do_rcv+0x161/0x250
tcp_v4_rcv+0xc3a/0xce0
ip_protocol_deliver_rcu+0x3d/0x230
ip_local_deliver_finish+0x54/0x60
ip_local_deliver+0xfd/0x110
? ip_protocol_deliver_rcu+0x230/0x230
ip_rcv+0xd6/0x100
? ip_local_deliver+0x110/0x110
__netif_receive_skb_one_core+0x85/0xa0
process_backlog+0xa4/0x160
__napi_poll+0x29/0x1b0
net_rx_action+0x287/0x300
__do_softirq+0xff/0x2fc
do_softirq+0x79/0x90
</IRQ>
drivers/infiniband/hw/irdma/ctrl.c:3605 irdma_sc_ceq_init()
warn: can subtract underflow 'info->dev->hmc_fpm_misc.max_ceqs'?
It appears that "info->dev->hmc_fpm_misc.max_ceqs" comes from the firmware
in irdma_sc_parse_fpm_query_buf() so, yes, there is a chance that it could
be zero. Even if we trust the firmware, it's easy enough to change the
condition just as a hardenning measure.
The HRTimer in the AB8500 charging code is using CLOCK_REALTIME
to set an alarm some hours forward in time +/- 5 min for a safety
timer.
I have observed that this will sometimes fire sporadically
early when charging a battery with the result that
charging stops.
As CLOCK_REALTIME can be subject to adjustments of time from
sources such as NTP, this cannot be trusted and will likely
for example fire events if the clock is set forward some hours
by say NTP.
Use CLOCK_MONOTONIC as indicated in other instances and the
problem goes away. Also initialize the timer to REL mode
as this is what will be used later.
Fixes: f26b27d27bc8 ("ab8500-chargalg: Use hrtimer") Cc: Lee Jones <lee.jones@linaro.org> Suggested-by: Matti Vaittinen <mazziesaccount@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
The reference counting issue happens in several error handling paths
on a refcounted object "nc->dmac". In these paths, the function simply
returns the error code, forgetting to balance the reference count of
"nc->dmac", increased earlier by dma_request_channel(), which may
cause refcount leaks.
Fix it by decrementing the refcount of specific object in those error
paths.
Fixes: 7a02889dc4ef ("mtd: nand: Cleanup/rework the atmel_nand driver") Co-developed-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn> Co-developed-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: Xin Tan <tanxin.ctf@gmail.com> Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn> Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220304085330.3610-1-xiongx18@fudan.edu.cn Signed-off-by: Sasha Levin <sashal@kernel.org>
pgd page is freed by generic implementation pgd_free() since commit c3a43f2688a6 ("asm-generic: pgalloc: provide generic pgd_free()"),
however, there are scenarios that the system uses more than one page as
the pgd table, in such cases the generic implementation pgd_free() won't
be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and
MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro "PGD_ORDER"
will be set as "1", which will cause allocating two pages as the pgd
table. Well, at the same time, the generic implementation pgd_free()
just free one pgd page, which will result in the memory leak.
The memory leak can be easily detected by executing shell command:
"while true; do ls > /dev/null; grep MemFree /proc/meminfo; done"
Fixes: c3a43f2688a6 ("asm-generic: pgalloc: provide generic pgd_free()") Signed-off-by: Yaliang Wang <Yaliang.Wang@windriver.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled.
A return of 0 causes the boot option/value to be listed as an Unknown
kernel parameter and added to init's (limited) argument or environment
strings. Also, error return codes don't mean anything to
obsolete_checksetup() -- only non-zero (usually 1) or zero.
So return 1 from setup_kmac().
Fixes: 109ad0abecde ("MIPS: RB532: Replace parse_mac_addr() with mac_pton().") Fixes: da7e1b07e004 ("[MIPS] Routerboard 532: Support for base system") Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
From: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Phil Sutter <n0-1@freewrt.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Daniel Walter <dwalter@google.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
The of_find_compatible_node() function returns a node pointer with
refcount incremented, We should use of_node_put() on it when done
Add the missing of_node_put() to release the refcount.
The device_node pointer is returned by of_parse_phandle() with refcount
incremented. We should use of_node_put() on it when done.
This function only calls of_node_put() in the regular path.
And it will cause refcount leak in error path.
Fixes: cd8407c3146e ("ath10k: Setup the msa resources before qmi init") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://lore.kernel.org/r/20220308070238.19295-1-linmq006@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
The vxcan driver provides a pair of virtual CAN interfaces to exchange
CAN traffic between different namespaces - analogue to veth.
In opposite to the vcan driver the local sent CAN traffic on this interface
is not echo'ed back but only sent to the remote peer. This is unusual and
can be easily fixed by removing IFF_ECHO from the netdevice flags that
are set for vxcan interfaces by default at startup.
Without IFF_ECHO set on driver level, the local sent CAN frames are echo'ed
in af_can.c in can_send(). This patch makes vxcan interfaces adopt the
same local echo behavior and procedures as known from the vcan interfaces.
Fixes: 8dfa99ec0376 ("can: add Virtual CAN Tunnel driver (vxcan)") Link: https://lore.kernel.org/all/20220309120416.83514-5-socketcan@hartkopp.net Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
mpc8xx_pic_init() should return -ENOMEM instead of 0 when
irq_domain_add_linear() return NULL. This cause mpc8xx_pics_init to continue
executing even if mpc8xx_pic_host is NULL.
The driver must perform its 4GB boundary check using the pool's DMA address
instead of using the virtual address.
Link: https://lore.kernel.org/r/20220303140230.13098-1-sreekanth.reddy@broadcom.com Fixes: df6c1c037d9f ("scsi: mpt3sas: Force PCIe scatterlist allocations to be within same 4 GB region") Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
In test_lwt_ip_encap, the ingress IPv6 encap test failed from time to
time. The failure occured when an IPv4 ping through the IPv6 GRE
encapsulation did not receive a reply within the timeout. The IPv4 ping
and the IPv6 ping in the test used different timeouts (1 sec for IPv4
and 6 sec for IPv6), probably taking into account that IPv6 might need
longer to successfully complete. However, when IPv4 pings (with the
short timeout) are encapsulated into the IPv6 tunnel, the delays of IPv6
apply.
The actual reason for the long delays with IPv6 was that the IPv6
neighbor discovery sometimes did not complete in time. This was caused
by the outgoing interface only having a tentative link local address,
i.e., not having completed DAD for that lladdr. The ND was successfully
retried after 1 sec but that was too late for the ping timeout.
The IPv6 addresses for the test were already added with nodad. However,
for the lladdrs, DAD was still performed. We now disable DAD in the test
netns completely and just assume that the two lladdrs on each veth pair
do not collide. This removes all the delays for IPv6 traffic in the
test.
Without the delays, we can now also reduce the delay of the IPv6 ping to
1 sec. This makes the whole test complete faster because we don't need
to wait for the excessive timeout for each IPv6 ping that is supposed
to fail.
xsk_umem__create() does mmap for fill/comp rings, but xsk_umem__delete()
doesn't do the unmap. This works fine for regular cases, because
xsk_socket__delete() does unmap for the rings. But for the case that
xsk_socket__create_shared() fails, umem rings are not unmapped.
fill_save/comp_save are checked to determine if rings have already be
unmapped by xsk. If fill_save and comp_save are NULL, it means that the
rings have already been used by xsk. Then they are supposed to be
unmapped by xsk_socket__delete(). Otherwise, xsk_umem__delete() does the
unmap.
Fixes: 3c545a59a8a2 ("libbpf: Support shared umems between queues and devices") Signed-off-by: Cheng Li <lic121@chinatelecom.cn> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220301132623.GA19995@vscode.7~ Signed-off-by: Sasha Levin <sashal@kernel.org>
As the potential failure of the devm_request_threaded_irq(),
it should be better to check the return value of the
mc13xxx_irq_request() and return error if fails.
Fixes: 31c475212b1f ("mfd: Add mc13892 support to mc13xxx") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20220224022331.3208275-1-jiasheng@iscas.ac.cn Signed-off-by: Sasha Levin <sashal@kernel.org>
Since commit d419ba88dbda ("powerpc/mm: Show if a bad page fault on data
is read or write.") we use page_fault_is_write(regs->dsisr) in
__bad_page_fault() to determine if the fault is for a read or write, and
change the message printed accordingly.
But SLB faults, aka Data Segment Interrupts, don't set DSISR (Data
Storage Interrupt Status Register) to a useful value. All ISA versions
from v2.03 through v3.1 specify that the Data Segment Interrupt sets
DSISR "to an undefined value". As far as I can see there's no mention of
SLB faults setting DSISR in any BookIV content either.
This manifests as accesses that should be a read being incorrectly
reported as writes, for example, using the xmon "dump" command:
0:mon> d 0x5deadbeef0000000 5deadbeef0000000
[359526.415354][ C6] BUG: Unable to handle kernel data access on write at 0x5deadbeef0000000
[359526.415611][ C6] Faulting instruction address: 0xc00000000010a300
cpu 0x6: Vector: 380 (Data SLB Access) at [c00000000ffbf400]
pc: c00000000010a300: mread+0x90/0x190
If we disassemble the PC, we see a load instruction:
We can also see in exceptions-64s.S that the data_access_slb block
doesn't set IDSISR=1, which means it doesn't load DSISR into pt_regs. So
the value we're using to determine if the fault is a read/write is some
stale value in pt_regs from a previous page fault.
Rework the printing logic to separate the SLB fault case out, and only
print read/write in the cases where we can determine it.
The result looks like eg:
0:mon> d 0x5deadbeef0000000 5deadbeef0000000
[ 721.779525][ C6] BUG: Unable to handle kernel data access at 0x5deadbeef0000000
[ 721.779697][ C6] Faulting instruction address: 0xc00000000014cbe0
cpu 0x6: Vector: 380 (Data SLB Access) at [c00000000ffbf390]
0:mon> d 0 0000000000000000
[ 742.793242][ C6] BUG: Kernel NULL pointer dereference at 0x00000000
[ 742.793316][ C6] Faulting instruction address: 0xc00000000014cbe0
cpu 0x6: Vector: 380 (Data SLB Access) at [c00000000ffbf390]
Fixes: d419ba88dbda ("powerpc/mm: Show if a bad page fault on data is read or write.") Reported-by: Nageswara R Sastry <rnsastry@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Link: https://lore.kernel.org/r/20220222113449.319193-1-mpe@ellerman.id.au Signed-off-by: Sasha Levin <sashal@kernel.org>
It makes no sense to fall through to `break'. Therefore reorder the
switch statements so as to have the Cavium cases first, followed by the
default case, which improves readability and pacifies code analysis
tools. No change in semantics, assembly produced is exactly the same.
Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Fixes: 64949eb655f6 ("MIPS: Fix fall-through warnings for Clang") Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
Include the DECstation interrupt handler in opting out of
FPU support.
Fixes a linker error:
mips-linux-ld: arch/mips/dec/int-handler.o: in function `fpu':
(.text+0x148): undefined reference to `handle_fpe_int'
Fixes: 7d500415c341 ("MIPS: Allow FP support to be disabled") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kernel test robot <lkp@intel.com> Cc: Paul Burton <paulburton@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Maciej W. Rozycki <macro@orcam.me.uk> Cc: linux-mips@vger.kernel.org Acked-by: Maciej W. Rozycki <macro@orcam.me.uk> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
If a memory allocation error occurred during an attempt to refill a slot
in the RX ring after the packet was received, the hardware tail pointer
would still have been updated to point to or past the slot which remained
marked as previously completed. This would likely result in the DMA engine
raising an error when it eventually tried to use that slot again.
If a slot cannot be refilled, then just stop processing and do not move
the tail pointer past it. On the next attempt, we should skip receiving
the packet from the empty slot and just try to refill it again.
This failure mode has not actually been observed, but was found as part
of other driver updates.
Fixes: 38d6a6ba0d0c ("drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver") Signed-off-by: Robert Hancock <robert.hancock@calian.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
For hardware that only supports 32-bit writes to PCI there is the
possibility of clearing RW1C (write-one-to-clear) bits. A rate-limited
messages was introduced by 682356c54c60, but rate-limiting is not the best
choice here. Some devices may not show the warnings they should if another
device has just produced a bunch of warnings. Also, the number of messages
can be a nuisance on devices which are otherwise working fine.
Change the ratelimit to a single warning per bus. This ensures no bus is
'starved' of emitting a warning and also that there isn't a continuous
stream of warnings. It would be preferable to have a warning per device,
but the pci_dev structure is not available here, and a lookup from devfn
would be far too slow.
Suggested-by: Bjorn Helgaas <helgaas@kernel.org> Fixes: 682356c54c60 ("PCI: Warn on possible RW1C corruption for sub-32 bit config writes") Link: https://lore.kernel.org/r/20200806041455.11070-1-mark.tomlinson@alliedtelesis.co.nz Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
As the potential failure of the wm8350_register_irq(),
it should be better to check it and return error if fails.
Also, use 'free_' in order to avoid same code.
Fixes: cb8d1b5dea66 ("power_supply: Add support for WM8350 PMU") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
This driver is for an FPGA logic core, so there can be arbitrarily many
instances of the bus on a given system. Previously all of the I2C bus
names were "xiic-i2c" which caused issues with lm_sensors when trying to
map human-readable names to sensor inputs because it could not properly
distinguish the busses, for example. Append the platform device name to
the I2C bus name so it is unique between different instances.
Fixes: fcc7f1ae6c30 ("i2c: Add support for Xilinx XPS IIC Bus Interface") Signed-off-by: Robert Hancock <robert.hancock@calian.com> Tested-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Per Intel's SDM on the "Instruction Set Reference", when
loading segment descriptor, not-present segment check should
be after all type and privilege checks. But the emulator checks
it first, then #NP is triggered instead of #GP if privilege fails
and segment is not present. Put not-present segment check after
type and privilege checks in __load_segment_descriptor().
Fixes: b7695559c973f (KVM: x86 emulator: Emulate task switch in emulator.c) Reviewed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Message-Id: <52573c01d369f506cadcf7233812427cf7db81a7.1644292363.git.houwenlong.hwl@antgroup.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
In emulation of writing to cr8, one of the lowest four bits in TPR[3:0]
is kept.
According to Intel SDM 10.8.6.1(baremetal scenario):
"APIC.TPR[bits 7:4] = CR8[bits 3:0], APIC.TPR[bits 3:0] = 0";
and SDM 28.3(use TPR shadow):
"MOV to CR8. The instruction stores bits 3:0 of its source operand into
bits 7:4 of VTPR; the remainder of VTPR (bits 3:0 and bits 31:8) are
cleared.";
and AMD's APM 16.6.4:
"Task Priority Sub-class (TPS)-Bits 3 : 0. The TPS field indicates the
current sub-priority to be used when arbitrating lowest-priority messages.
This field is written with zero when TPR is written using the architectural
CR8 register.";
so in KVM emulated scenario, clear TPR[3:0] to make a consistent behavior
as in other scenarios.
This doesn't impact evaluation and delivery of pending virtual interrupts
because processor does not use the processor-priority sub-class to
determine which interrupts to delivery and which to inhibit.
Sub-class is used by hardware to arbitrate lowest priority interrupts,
but KVM just does a round-robin style delivery.
When CONFIG_GENERIC_CPU=y (true for all our defconfigs) we pass
-mcpu=powerpc64 to the compiler, even when we're building a 32-bit
kernel.
This happens because we have an ifdef CONFIG_PPC_BOOK3S_64/else block in
the Makefile that was written before 32-bit supported GENERIC_CPU. Prior
to that the else block only applied to 64-bit Book3E.
The GCC man page says -mcpu=powerpc64 "[specifies] a pure ... 64-bit big
endian PowerPC ... architecture machine [type], with an appropriate,
generic processor model assumed for scheduling purposes."
It's unclear how that interacts with -m32, which we are also passing,
although obviously -m32 is taking precedence in some sense, as the
32-bit kernel only contains 32-bit instructions.
This was noticed by inspection, not via any bug reports, but it does
affect code generation. Comparing before/after code generation, there
are some changes to instruction scheduling, and the after case (with
-mcpu=powerpc64 removed) the compiler seems more keen to use r8.
Fix it by making the else case only apply to Book3E 64, which excludes
32-bit.
Executing node_set_online() when nid = NUMA_NO_NODE results in an
undefined behavior. node_set_online() will call node_set_state(), into
__node_set(), into set_bit(), and since NUMA_NO_NODE is -1 we'll end up
doing a negative shift operation inside
arch/powerpc/include/asm/bitops.h. This potential UB was detected
running a kernel with CONFIG_UBSAN.
The behavior was introduced by commit fba7e7eafe31 ("powerpc/numa: Fix a
regression on memoryless node 0"), where the check for nid > 0 was
removed to fix a problem that was happening with nid = 0, but the result
is that now we're trying to online NUMA_NO_NODE nids as well.
Checking for nid >= 0 will allow node 0 to be onlined while avoiding
this UB with NUMA_NO_NODE.
Fixes: fba7e7eafe31 ("powerpc/numa: Fix a regression on memoryless node 0") Reported-by: Ping Fang <pifang@redhat.com> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220224182312.1012527-1-danielhb413@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
The PD id is masked with 0x7fff, while PD can be 18 bits for GEN2 HW.
Remove the masking as it should not be needed and can cause incorrect PD
id to be used.
Using PCI_FUNC macro in a VM, when the device is in passthrough mode does
not provide the real function instance. This means that currently, devices
will not probe unless the instance in the VM matches the instance in the
host.
Fix this by getting the pf_id from the LAN during the probe.
Fixes: a6f904309fc9 ("RDMA/irdma: Register auxiliary driver and implement private channel OPs") Link: https://lore.kernel.org/r/20220225163211.127-3-shiraz.saleem@intel.com Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Fix a race in the xsk socket teardown code that can lead to a NULL pointer
dereference splat. The current xsk unbind code in xsk_unbind_dev() starts by
setting xs->state to XSK_UNBOUND, sets xs->dev to NULL and then waits for any
NAPI processing to terminate using synchronize_net(). After that, the release
code starts to tear down the socket state and free allocated memory.
There are two problems with the current code. First, setting xs->dev to NULL
before waiting for all users to stop using the socket is not correct. The
entry to the data plane functions xsk_poll(), xsk_sendmsg(), and xsk_recvmsg()
are all guarded by a test that xs->state is in the state XSK_BOUND and if not,
it returns right away. But one process might have passed this test but still
have not gotten to the point in which it uses xs->dev in the code. In this
interim, a second process executing xsk_unbind_dev() might have set xs->dev to
NULL which will lead to a crash for the first process. The solution here is
just to get rid of this NULL assignment since it is not used anymore. Before
commit 089e28c2ac69 ("xsk: use state member for socket synchronization"),
xs->dev was the gatekeeper to admit processes into the data plane functions,
but it was replaced with the state variable xs->state in the aforementioned
commit.
The second problem is that synchronize_net() does not wait for any process in
xsk_poll(), xsk_sendmsg(), or xsk_recvmsg() to complete, which means that the
state they rely on might be cleaned up prematurely. This can happen when the
notifier gets called (at driver unload for example) as it uses xsk_unbind_dev().
Solve this by extending the RCU critical region from just the ndo_xsk_wakeup
to the whole functions mentioned above, so that both the test of xs->state ==
XSK_BOUND and the last use of any member of xs is covered by the RCU critical
section. This will guarantee that when synchronize_net() completes, there will
be no processes left executing xsk_poll(), xsk_sendmsg(), or xsk_recvmsg() and
state can be cleaned up safely. Note that we need to drop the RCU lock for the
skb xmit path as it uses functions that might sleep. Due to this, we have to
retest the xs->state after we grab the mutex that protects the skb xmit code
from, among a number of things, an xsk_unbind_dev() being executed from the
notifier at the same time.
Fixes: 089e28c2ac69 ("xsk: use state member for socket synchronization") Reported-by: Elza Mathew <elza.mathew@intel.com> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Björn Töpel <bjorn@kernel.org> Link: https://lore.kernel.org/bpf/20220228094552.10134-1-magnus.karlsson@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
insn_to_jit_off passed to bpf_prog_fill_jited_linfo() is calculated in
instruction granularity instead of bytes granularity, but BPF line info
requires byte offset.
bpf_prog_fill_jited_linfo() will be the last user of ctx.offset before
it is freed, so convert the offset into byte-offset before calling into
bpf_prog_fill_jited_linfo() in order to fix the line info dump on arm64.
Fixes: c9dab34e57b5 ("bpf: arm64: Enable arm64 jit to provide bpf_line_info") Suggested-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220226121906.5709-3-houtao1@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
BPF line info needs ctx->offset to be the instruction offset in the whole JITed
image instead of the body itself, so also call build_prologue() first in first
JIT pass.
Fixes: c9dab34e57b5 ("bpf: arm64: Enable arm64 jit to provide bpf_line_info") Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220226121906.5709-2-houtao1@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Currently the permission of parameter prot_mask is 0x0, which means that
the member does not appear in sysfs. Change it as other module parameters
to 0444 for world-readable.
[mkp: s/v3/v2/]
Link: https://lore.kernel.org/r/1645703489-87194-2-git-send-email-john.garry@huawei.com Fixes: e474b18e2f82 ("scsi: hisi_sas: Add support for DIF feature for v2 hw") Reported-by: Yihang Li <liyihang6@hisilicon.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
We need to calculate the max file size accurately if the total blocks
that can address by block tree exceed the upper_limit. But this check is
not correct now, it only compute the total data blocks but missing
metadata blocks are needed. So in the case of "data blocks < upper_limit
&& total blocks > upper_limit", we will get wrong result. Fortunately,
this case could not happen in reality, but it's confused and better to
correct the computing.
__setup() handlers should return 1 if the parameter is handled.
Returning 0 causes the entire string to be added to init's
environment strings (limited to 32 strings), unnecessarily polluting it.
Using the documented strings "TOMOYO_loader=string1" and
"TOMOYO_trigger=string2" causes an Unknown parameter message:
Unknown kernel command line parameters
"BOOT_IMAGE=/boot/bzImage-517rc5 TOMOYO_loader=string1 \
TOMOYO_trigger=string2", will be passed to user space.
and these strings are added to init's environment string space:
Run /sbin/init as init process
with arguments:
/sbin/init
with environment:
HOME=/
TERM=linux
BOOT_IMAGE=/boot/bzImage-517rc5
TOMOYO_loader=string1
TOMOYO_trigger=string2
With this change, these __setup handlers act as expected,
and init's environment is not polluted with these strings.
Fixes: df7e01662e1b1 ("TOMOYO: Make several options configurable.") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru> Link: https://lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Cc: James Morris <jmorris@namei.org> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: tomoyo-dev-en@lists.osdn.me Cc: "Serge E. Hallyn" <serge@hallyn.com> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Sasha Levin <sashal@kernel.org>
When an ODP MR cache entry is empty and trying to allocate it, increment
the ent->miss counter and call to queue_adjust_cache_locked() to verify
the entry is balanced.
In pm80xx_send_abort_all(), the n_elem field of the ccb used is not
initialized to 0. This missing initialization sometimes lead to the task
completion path seeing the ccb with a non-zero n_elem resulting in the
execution of invalid dma_unmap_sg() calls in pm8001_ccb_task_free(),
causing a crash such as:
Avoid this issue by always initializing the ccb n_elem field to 0 in
pm8001_send_abort_all(), pm8001_send_read_log() and
pm80xx_send_abort_all().
Link: https://lore.kernel.org/r/20220220031810.738362-17-damien.lemoal@opensource.wdc.com Fixes: 39e195660e17 ("[SCSI] pm80xx: NCQ error handling changes") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
NCQ NON DATA is an NCQ command with the DMA_NONE DMA direction and so a
register-device-to-host-FIS response is expected for it.
However, for an IO_SUCCESS case, mpi_sata_completion() expects a
set-device-bits-FIS for any ata task with an use_ncq field true, which
includes NCQ NON DATA commands.
Fix this to correctly treat NCQ NON DATA commands as non-data by also
testing for the DMA_NONE DMA direction.
Link: https://lore.kernel.org/r/20220220031810.738362-16-damien.lemoal@opensource.wdc.com Fixes: d8bc927408e3 ("[SCSI] pm8001: add SAS/SATA HBA driver") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
In the pm8001_chip_sata_req() and pm80xx_chip_sata_req() functions, all
tasks with a DMA direction of DMA_NONE (no data transfer) are initialized
using the ATAP value 0x04. However, NCQ NON DATA commands, while being
DMA_NONE commands are NCQ commands and need to be initialized using the
value 0x07 for ATAP, similarly to other NCQ commands.
Make sure that NCQ NON DATA command tasks are initialized similarly to
other NCQ commands by also testing the task "use_ncq" field in addition to
the DMA direction. While at it, reorganize the code into a chain of if -
else if - else to avoid useless affectations and debug messages.
Link: https://lore.kernel.org/r/20220220031810.738362-15-damien.lemoal@opensource.wdc.com Fixes: d8bc927408e3 ("[SCSI] pm8001: add SAS/SATA HBA driver") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Make sure that the __le32 fields of struct sata_cmd are manipulated after
applying the correct endian conversion. That is, use cpu_to_le32() for
assigning values and le32_to_cpu() for consulting a field value. In
particular, make sure that the calculations for the 4G boundary check are
done using CPU endianness and *not* little endian values. With these fixes,
many sparse warnings are removed.
While at it, fix some code identation and add blank lines after variable
declarations and in some other places to make this code more readable.
Link: https://lore.kernel.org/r/20220220031810.738362-12-damien.lemoal@opensource.wdc.com Fixes: d5d463ea80b1 ("[SCSI] pm80xx: 4G boundary fix.") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Make sure that the __le32 fields of struct ssp_ini_io_start_req are
manipulated after applying the correct endian conversion. That is, use
cpu_to_le32() for assigning values and le32_to_cpu() for consulting a field
value. In particular, make sure that the calculations for the 4G boundary
check are done using CPU endianness and *not* little endian values. With
these fixes, many sparse warnings are removed.
While at it, add blank lines after variable declarations and in some other
places to make this code more readable.
Link: https://lore.kernel.org/r/20220220031810.738362-11-damien.lemoal@opensource.wdc.com Fixes: d5d463ea80b1 ("[SCSI] pm80xx: 4G boundary fix.") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
All fields of the kek_mgmt_req structure have the type __le32. So make sure
to use cpu_to_le32() to initialize them. This suppresses the sparse
warning:
warning: incorrect type in assignment (different base types)
expected restricted __le32 [addressable] [assigned] [usertype] new_curidx_ksop
got int
Link: https://lore.kernel.org/r/20220220031810.738362-10-damien.lemoal@opensource.wdc.com Fixes: 22df789469b7 ("[SCSI] pm80xx: Added SPCv/ve specific hardware functionalities and relevant changes in common files") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
All fields of the SASProtocolTimerConfig structure have the __le32 type.
As such, use cpu_to_le32() to initialize them. This change suppresses many
sparse warnings:
warning: incorrect type in assignment (different base types)
expected restricted __le32 [addressable] [usertype] pageCode
got int
Note that the check to limit the value of the STP_IDLE_TMO field is removed
as this field is initialized using the fixed (and small) value defined by
the STP_IDLE_TIME macro.
The pm8001_dbg() calls printing the values of the SASProtocolTimerConfig
structure fileds are changed to use le32_to_cpu() to present the values in
human readable form.
Link: https://lore.kernel.org/r/20220220031810.738362-9-damien.lemoal@opensource.wdc.com Fixes: a83b983b3e22 ("[SCSI] pm80xx: thermal, sas controller config and error handling update") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
The fields of the set_ctrl_cfg_req structure have the __le32 type, so use
cpu_to_le32() to assign them. This removes the sparse warnings:
warning: incorrect type in assignment (different base types)
expected restricted __le32
got unsigned int
Link: https://lore.kernel.org/r/20220220031810.738362-8-damien.lemoal@opensource.wdc.com Fixes: 23e69d8cb841 ("pm80xx: Update For Thermal Page Code") Fixes: 22df789469b7 ("[SCSI] pm80xx: Added SPCv/ve specific hardware functionalities and relevant changes in common files") Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
The ds_ads_m field of struct ssp_ini_tm_start_req has the type __le32.
Assigning a value to it should thus use cpu_to_le32(). This fixes the
sparse warning:
warning: incorrect type in assignment (different base types)
expected restricted __le32 [addressable] [assigned] [usertype] ds_ads_m
got int
Link: https://lore.kernel.org/r/20220220031810.738362-7-damien.lemoal@opensource.wdc.com Fixes: d8bc927408e3 ("[SCSI] pm8001: add SAS/SATA HBA driver") Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Since the sata_cmd struct is zeroed out before its fields are initialized,
there is no need for using "|=" to initialize the ncqtag_atap_dir_m
field. Using a standard assignment removes the sparse warning:
warning: invalid assignment: |=
Also, since the ncqtag_atap_dir_m field has type __le32, use cpu_to_le32()
to generate the assigned value.
Link: https://lore.kernel.org/r/20220220031810.738362-5-damien.lemoal@opensource.wdc.com Fixes: 39e195660e17 ("[SCSI] pm80xx: NCQ error handling changes") Reviewed-by: John Garry <john.garry@huawei.com> Reviewed-by: Jack Wang <jinpu.wang@ionos.com> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
If 'vfio_pci_core_device::needs_pm_restore' is set (PCI device does
not have No_Soft_Reset bit set in its PMCSR config register), then the
current PCI state will be saved locally in
'vfio_pci_core_device::pm_save' during D0->D3hot transition and same
will be restored back during D3hot->D0 transition. For reset-related
functionalities, vfio driver uses PCI reset API's. These
API's internally change the PCI power state back to D0 first if
the device power state is non-D0. This state change to D0 will happen
without the involvement of vfio driver.
Let's consider the following example:
1. The device is in D3hot.
2. User invokes VFIO_DEVICE_RESET ioctl.
3. pci_try_reset_function() will be called which internally
invokes pci_dev_save_and_disable().
4. pci_set_power_state(dev, PCI_D0) will be called first.
5. pci_save_state() will happen then.
Now, for the devices which has NoSoftRst-, the pci_set_power_state()
can trigger soft reset and the original PCI config state will be lost
at step (4) and this state cannot be restored again. This original PCI
state can include any setting which is performed by SBIOS or host
linux kernel (for example LTR, ASPM L1 substates, etc.). When this
soft reset will be triggered, then all these settings will be reset,
and the device state saved at step (5) will also have this setting
cleared so it cannot be restored. Since the vfio driver only exposes
limited PCI capabilities to its user, so the vfio driver user also
won't have the option to save and restore these capabilities state
either and these original settings will be permanently lost.
For pci_reset_bus() also, we can have the above situation.
The other functions/devices can be in D3hot and the reset will change
the power state of all devices to D0 without the involvement of vfio
driver.
So, before calling any reset-related API's, we need to make sure that
the device state is D0. This is mainly to preserve the state around
soft reset.
For vfio_pci_core_disable(), we use __pci_reset_function_locked()
which internally can use pci_pm_reset() for the function reset.
pci_pm_reset() requires the device power state to be in D0, otherwise
it returns error.
This patch changes the device power state to D0 by invoking
vfio_pci_set_power_state() explicitly before calling any reset related
API's.
Fixes: 33b7cef76bfc ("vfio/pci: Restore device state on PM transition") Signed-off-by: Abhishek Sahu <abhsahu@nvidia.com> Link: https://lore.kernel.org/r/20220217122107.22434-3-abhsahu@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
If 'vfio_pci_core_device::needs_pm_restore' is set (PCI device does
not have No_Soft_Reset bit set in its PMCSR config register), then
the current PCI state will be saved locally in
'vfio_pci_core_device::pm_save' during D0->D3hot transition and same
will be restored back during D3hot->D0 transition.
For saving the PCI state locally, pci_store_saved_state() is being
used and the pci_load_and_free_saved_state() will free the allocated
memory.
But for reset related IOCTLs, vfio driver calls PCI reset-related
API's which will internally change the PCI power state back to D0. So,
when the guest resumes, then it will get the current state as D0 and it
will skip the call to vfio_pci_set_power_state() for changing the
power state to D0 explicitly. In this case, the memory pointed by
'pm_save' will never be freed. In a malicious sequence, the state changing
to D3hot followed by VFIO_DEVICE_RESET/VFIO_DEVICE_PCI_HOT_RESET can be
run in a loop and it can cause an OOM situation.
This patch frees the earlier allocated memory first before overwriting
'pm_save' to prevent the mentioned memory leak.
Fixes: 33b7cef76bfc ("vfio/pci: Restore device state on PM transition") Signed-off-by: Abhishek Sahu <abhsahu@nvidia.com> Link: https://lore.kernel.org/r/20220217122107.22434-2-abhsahu@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Explicitly convert unsigned int in the right of the conditional
expression to int to match the left side operand and the return type,
fixing the following compiler warning:
drivers/md/dm-crypt.c:2593:43: warning: signed and unsigned
type in conditional expression [-Wsign-compare]
Fixes: 445de0233653 ("dm crypt: add ability to use keys from the kernel key retention service") Signed-off-by: Aashish Sharma <shraash@google.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
DP audio enablement code which is comparing intf_type,
DRM_MODE_ENCODER_TMDS (= 2) with DRM_MODE_CONNECTOR_DisplayPort (= 10).
Which would never succeed. Fix it to check for DRM_MODE_ENCODER_TMDS.
Fixes: 80d99f9671f8 ("drm/msm/dp: add audio support for Display Port on MSM") Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20220217035358.465904-2-dmitry.baryshkov@linaro.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
The dsi_7nm_phy_enable() disagrees with downstream for
glbl_str_swi_cal_sel_ctrl and glbl_hstx_str_ctrl_0 values. Update
programmed settings to match downstream driver. To remove the
possibility for such errors in future drop less_than_1500_mhz
assignment and specify settings explicitly.
All DSI PHY/PLL drivers were referencing their VCO parent clock by a
global name, most of which don't exist or have been renamed. These
clock drivers seem to function fine without that except the 14nm driver
for sdm6xx [1].
At the same time all DTs provide a "ref" clock as per the requirements
of dsi-phy-common.yaml, but the clock is never used. This patchset puts
that clock to use without relying on a global clock name, so that all
dependencies are explicitly defined in DT (the firmware) in the end.
Note that this patch intentionally breaks older firmware (DT) that
relies on the clock to be found globally instead. The only affected
platform is msm8974 [2] for whose dsi_phy_28nm a .name="xo" fallback is
left in place to accommodate a more graceful transition period. All
other platforms had the "ref" clock added to their phy node since its
inception, or in a followup patch some time after. These patches
wrongly assumed that the "ref" clock was actively used and have hence
been listed as "Fixes:" below.
Furthermore apq8064 was providing the wrong 19.2MHz cxo instead of
27MHz pxo clock, which has been addressed in [3].
It is expected that both [2] and [3] are applied to the tree well in
advance of this patch such that any actual breakage is extremely
unlikely, but might still occur if kernel upgrades are performed without
the DT to match. After some time the fallback for msm8974 can be
removed again as well.
Fixes: d6cdf194b4ff ("arm64: dts: qcom: msm8916: Set 'xo_board' as ref clock of the DSI PHY") Fixes: 8b18982e1291 ("ARM: dts: qcom-apq8064: Set 'cxo_board' as ref clock of the DSI PHY") Fixes: b1a4d80c825a ("arm64: dts: sdm845: Set 'bi_tcxo' as ref clock of the DSI PHYs") Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20210911131922.387964-2-marijn.suijten@somainline.org Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Some of DP link compliant test expects to return fail-safe mode
if prefer detailed timing mode can not be supported by mainlink's
lane and rate after link training. Therefore add fail-safe mode
into connector mode list as backup mode. This patch fixes test
case 4.2.2.1.
Changes in v2:
-- add Fixes text string
Fixes: 4c34f33bbdae ( "drm/msm/dp: reduce link rate if failed at link training 1") Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/1643066274-25814-1-git-send-email-quic_khsieh@quicinc.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Each DP link training contains link training 1 followed by link
training 2. There is maximum of 5 retries of DP link training
before declared link training failed. It is required to stop link
training at end of link training 2 if it is failed so that next
link training 1 can start freshly. This patch fixes link compliance
test case 4.3.1.13 (Source Device Link Training EQ Fallback Test).
Changes in v10:
-- group into one series
Changes in v11:
-- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read
Fixes: bb7f27b18d7c ("drm/msm/dp: do not end dp link training until video is ready") Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/1642531648-8448-5-git-send-email-quic_khsieh@quicinc.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
DP CTS test case 4.2.2.6 has valid edid with bad checksum on purpose
and expect DP source return correct checksum. During drm edid read,
correct edid checksum is calculated and stored at
connector::real_edid_checksum.
The problem is struct dp_panel::connector never be assigned, instead the
connector is stored in struct msm_dp::connector. When we run compliance
testing test case 4.2.2.6 dp_panel_handle_sink_request() won't have a valid
edid set in struct dp_panel::edid so we'll try to use the connectors
real_edid_checksum and hit a NULL pointer dereference error because the
connector pointer is never assigned.
Changes in V2:
-- populate panel connector at msm_dp_modeset_init() instead of at dp_panel_read_sink_caps()
Changes in V3:
-- remove unhelpful kernel crash trace commit text
-- remove renaming dp_display parameter to dp
Changes in V4:
-- add more details to commit text
Changes in v10:
-- group into one series
Changes in v11:
-- drop drm/msm/dp: dp_link_parse_sink_count() return immediately if aux read
In devicetree the flash information is embedded within nand chip node,
so during nand chip initialization the nand chip node should be passed
to nand_set_flash_node() api, instead of nand controller node.
Fixes: be2e647f1639 ("mtd: rawnand: pl353: Add support for the ARM PL353 SMC NAND controller") Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220209053427.27676-1-amit.kumar-mahapatra@xilinx.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Currently the error -EIO is being assinged to variable ret when
the READY_BIT is not set but the function iwlagn_mac_start returns
0 rather than ret. Fix this by returning ret instead of 0.
Addresses-Coverity: ("Unused value") Fixes: 881a5b679e74 ("iwlwifi: move all mac80211 related functions to one place") Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20210907104658.14706-1-colin.king@canonical.com Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Due to preg protection we cannot write to this register
while FW is running (when FW in Halt it is ok).
since we have some cases that we need to dump this
region while FW is running remove this writing from DRV.
FW will do this writing.
Since commit 31793ce79203 ("cfg80211: avoid holding the RTNL when
calling the driver") we're not only holding the RTNL when going
in and out of suspend, but also the wiphy->mtx. Add that to the
D3 test debugfs in iwlwifi since it's required for various calls
to mac80211.
Fixes: 31793ce79203 ("cfg80211: avoid holding the RTNL when calling the driver") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Fixes: 31793ce79203 ("cfg80211: avoid holding the RTNL when calling the driver") Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20220129105618.fcec0204e162.Ib73bf787ab4d83581de20eb89b1f8dbfcaaad0e3@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
We may not have all the interfaces added to the driver when we get the
THERMAL_DUAL_CHAIN_REQUEST notification from the FW, so instead of
iterating all vifs to update SMPS, iterate only the ones that are
already assigned. The interfaces that were not assigned yet, will be
updated accordingly when we start using them.
The recent fix for NULL sta in iwl_mvm_get_tx_rate() still has a call
of iwl_mvm_sta_from_mac80211() that may be called with NULL sta.
Although this practically only points to the address and the actual
access doesn't happen due to the conditional evaluation at a later
point, it looks a bit flaky.
This patch drops the temporary variable above and evaluates
iwm_mvm_sta_from_mac80211() directly for avoiding confusions.
This patch added the data checksum error mib counters check for the
script mptcp_connect.sh when the data checksum is enabled.
In do_transfer(), got the mib counters twice, before and after running
the mptcp_connect commands. The latter minus the former is the actual
number of the data checksum mib counter.
The output looks like this:
ns1 MPTCP -> ns2 (dead:beef:1::2:10007) MPTCP (duration 86ms) [ OK ]
ns1 MPTCP -> ns2 (10.0.2.1:10008 ) MPTCP (duration 66ms) [ FAIL ]
server got 1 data checksum error[s]
Fixes: 9d60d6c1b2c75 ("selftests: mptcp: enable checksum in mptcp_connect.sh") Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/255 Signed-off-by: Geliang Tang <geliang.tang@suse.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
This is caused by dax_fs_exit() not flushing inodes before destroy cache.
To fix this issue, call rcu_barrier() before destroy cache.
Signed-off-by: Tong Zhang <ztong0001@gmail.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20220212071111.148575-1-ztong0001@gmail.com Fixes: 873d92e6523e ("dax: refactor dax-fs into a generic provider of 'struct dax_device' instances") Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
[Why]
When display topology changed on DSC hub we add all crtcs with dsc support to
atomic state.
Refer to patch:"drm/amd/display: Trigger modesets on MST DSC connectors"
However the original implementation may skip crtc if the topology change
caused by unplug.
That potentially could lead to no-lightup or corruption on DSC hub after
unplug event on one of the connectors.
[How]
Update add_affected_mst_dsc_crtcs() to use old connector state
if new connector state has no crtc (undergoes modeset due to unplug)
Fixes: 4d507e0446946c ("drm/amd/display: Trigger modesets on MST DSC connectors") Reviewed-by: Hersen Wu <hersenwu@amd.com> Acked-by: Jasdeep Dhillon <jdhillon@amd.com> Signed-off-by: Roman Li <Roman.Li@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
[why]
pm sysfs should be writable in one VF mode as is in passthrough
[how]
do not remove write access on pm sysfs if device is in one VF mode
Fixes: cc83e79fbaa1 ("amdgpu/pm: Make sysfs pm attributes as read-only for VFs") Signed-off-by: Yiqing Yao <yiqing.yao@amd.com> Reviewed-by: Monk Liu <Monk.liu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
When reworking btf__get_from_id() in commit 227be16bb635 the error
handling when calling bpf_btf_get_fd_by_id() changed. Before the rework
if bpf_btf_get_fd_by_id() failed the error would not be propagated to
callers of btf__get_from_id(), after the rework it is. This lead to a
change in behavior in print_key_value() that now prints an error when
trying to lookup keys in maps with no btf available.
Fix this by following the way used in dumping maps to allow to look up
keys in no-btf maps, by which it decides whether and where to get the
btf info according to the btf value type.
Fixes: 227be16bb635 ("libbpf: Add internal helper to load BTF data by FD") Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/bpf/1644249625-22479-1-git-send-email-yinjun.zhang@corigine.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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