diff options
| author | Basavaraj Natikar <Basavaraj.Natikar@amd.com> | 2023-03-29 22:58:59 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2023-04-06 16:23:59 -0500 |
| commit | f195fc1e9715ba826c3b62d58038f760f66a4fe9 (patch) | |
| tree | 710078aec9f4122e6c4c950a4d5d9aad846f2858 /drivers/pci/remove.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%2Fz9GdHjPyF2rNG3@glanzmann.de/T/#u
Link: https://lore.kernel.org/r/20230329172859.699743-1-Basavaraj.Natikar@amd.com
Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Tested-by: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/pci/remove.c')
0 files changed, 0 insertions, 0 deletions