]> git.baikalelectronics.ru Git - kernel.git/commit
PCI/ASPM: Disable ASPM on ASMedia ASM1083/1085 PCIe-to-PCI bridge
authorRobert Hancock <hancockrwd@gmail.com>
Wed, 22 Jul 2020 02:18:03 +0000 (20:18 -0600)
committerBjorn Helgaas <bhelgaas@google.com>
Wed, 29 Jul 2020 23:35:45 +0000 (18:35 -0500)
commit7956aadf3f1afa83045476dbc72802c3115b5085
tree051730f839c53269a6d9f86a37c46bfd200a5a4c
parent4e78093cca0fce2b0dd578ad67ac2c1c40a36a7c
PCI/ASPM: Disable ASPM on ASMedia ASM1083/1085 PCIe-to-PCI bridge

Recently ASPM handling was changed to allow ASPM on PCIe-to-PCI/PCI-X
bridges.  Unfortunately the ASMedia ASM1083/1085 PCIe to PCI bridge device
doesn't seem to function properly with ASPM enabled.  On an Asus PRIME
H270-PRO motherboard, it causes errors like these:

  pcieport 0000:00:1c.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID)
  pcieport 0000:00:1c.0: AER:   device [8086:a292] error status/mask=00003000/00002000
  pcieport 0000:00:1c.0: AER:    [12] Timeout
  pcieport 0000:00:1c.0: AER: Corrected error received: 0000:00:1c.0
  pcieport 0000:00:1c.0: AER: can't find device of ID00e0

In addition to flooding the kernel log, this also causes the machine to
wake up immediately after suspend is initiated.

The device advertises ASPM L0s and L1 support in the Link Capabilities
register, but the ASMedia web page for ASM1083 [1] claims "No PCIe ASPM
support".

Windows 10 (build 2004) enables L0s, but it also logs correctable PCIe
errors.

Add a quirk to disable ASPM for this device.

[1] https://www.asmedia.com.tw/eng/e_show_products.php?cate_index=169&item=114

[bhelgaas: commit log]
Fixes: 004eb4b7384c ("PCI/ASPM: Allow ASPM on links to PCIe-to-PCI/PCI-X Bridges")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=208667
Link: https://lore.kernel.org/r/20200722021803.17958-1-hancockrwd@gmail.com
Signed-off-by: Robert Hancock <hancockrwd@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
drivers/pci/quirks.c