]> git.baikalelectronics.ru Git - kernel.git/commit
usb: cdns3: Put the cdns set active part outside the spin lock
authorXiaolei Wang <xiaolei.wang@windriver.com>
Fri, 16 Jun 2023 02:19:51 +0000 (10:19 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 23 Sep 2023 09:11:06 +0000 (11:11 +0200)
commitbbc9c3652708108738009e096d608ece3cd9fa8a
tree7fdfe5b03e98226491b0403bdc73e54381b69ae2
parent96a0bf5827e7035d5121560952cd047b92fb4a40
usb: cdns3: Put the cdns set active part outside the spin lock

[ Upstream commit 2319b9c87fe243327285f2fefd7374ffd75a65fc ]

The device may be scheduled during the resume process,
so this cannot appear in atomic operations. Since
pm_runtime_set_active will resume suppliers, put set
active outside the spin lock, which is only used to
protect the struct cdns data structure, otherwise the
kernel will report the following warning:

  BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1163
  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 651, name: sh
  preempt_count: 1, expected: 0
  RCU nest depth: 0, expected: 0
  CPU: 0 PID: 651 Comm: sh Tainted: G        WC         6.1.20 #1
  Hardware name: Freescale i.MX8QM MEK (DT)
  Call trace:
    dump_backtrace.part.0+0xe0/0xf0
    show_stack+0x18/0x30
    dump_stack_lvl+0x64/0x80
    dump_stack+0x1c/0x38
    __might_resched+0x1fc/0x240
    __might_sleep+0x68/0xc0
    __pm_runtime_resume+0x9c/0xe0
    rpm_get_suppliers+0x68/0x1b0
    __pm_runtime_set_status+0x298/0x560
    cdns_resume+0xb0/0x1c0
    cdns3_controller_resume.isra.0+0x1e0/0x250
    cdns3_plat_resume+0x28/0x40

Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20230616021952.1025854-1-xiaolei.wang@windriver.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/usb/cdns3/cdns3-plat.c
drivers/usb/cdns3/cdnsp-pci.c
drivers/usb/cdns3/core.c
drivers/usb/cdns3/core.h