[PATCH 5.10 179/406] PCI: Mark NVIDIA T4 GPUs to avoid bus reset

Greg Kroah-Hartman
2023-09-17T19:30:34Z

From: Wu Zongyong <wuzongyong@linux.alibaba.com>

[ Upstream commit d5af729dc2071273f14cbb94abbc60608142fd83 ]

NVIDIA T4 GPUs do not work with SBR. This problem is found when the T4 card
is direct attached to a Root Port only. Avoid bus reset by marking T4 GPUs
PCI_DEV_FLAGS_NO_BUS_RESET.

Fixes: 4c207e7121fa ("PCI: Mark some NVIDIA GPUs to avoid bus reset")
Link: https://lore.kernel.org/r/2dcebea53a6eb9bd212ec6d8974af2e5e0333ef6.1681129861.git.wuzongyong@linux.alibaba.com
Signed-off-by: Wu Zongyong <wuzongyong@linux.alibaba.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pci/quirks.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index c0d1134811915..1193c81f88964 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3578,7 +3578,7 @@ static void quirk_no_bus_reset(struct pci_dev *dev)
*/
static void quirk_nvidia_no_bus_reset(struct pci_dev *dev)
{
- if ((dev->device & 0xffc0) == 0x2340)
+ if ((dev->device & 0xffc0) == 0x2340 || dev->device == 0x1eb8)
quirk_no_bus_reset(dev);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
--
2.40.1