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| author | Basavaraj Natikar <[email protected]> | 2023-03-29 22:58:59 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2023-04-06 16:23:59 -0500 |
| commit | f195fc1e9715ba826c3b62d58038f760f66a4fe9 (patch) | |
| tree | 710078aec9f4122e6c4c950a4d5d9aad846f2858 /lib/debugobjects.c | |
| parent | 195d8e5da3acb17c5357526494f818a21e97cd10 (diff) | |
x86/PCI: Add quirk for AMD XHCI controller that loses MSI-X state in D3hot
The AMD [1022:15b8] USB controller loses some internal functional MSI-X
context when transitioning from D0 to D3hot. BIOS normally traps D0->D3hot
and D3hot->D0 transitions so it can save and restore that internal context,
but some firmware in the field can't do this because it fails to clear the
AMD_15B8_RCC_DEV2_EPF0_STRAP2 NO_SOFT_RESET bit.
Clear AMD_15B8_RCC_DEV2_EPF0_STRAP2 NO_SOFT_RESET bit before USB controller
initialization during boot.
Link: https://lore.kernel.org/linux-usb/Y%[email protected]/T/#u
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Thomas Glanzmann <[email protected]>
Tested-by: Thomas Glanzmann <[email protected]>
Signed-off-by: Basavaraj Natikar <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Mario Limonciello <[email protected]>
Cc: [email protected]
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions