PCI: Mark NVIDIA T4 GPUs to avoid bus reset

Wu Zongyong · bjorn-helgaas · commit d5af729dc207 · 2023-08-09T18:03:45.000-05:00
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: 4c207e7 ("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>
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
@@ -3724,7 +3724,7 @@ 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,

Original file line number	Diff line number	Diff line change
`@@ -3724,7 +3724,7 @@ static void quirk_no_bus_reset(struct pci_dev *dev)`
`3724`	`3724`	`*/`
`3725`	`3725`	`static void quirk_nvidia_no_bus_reset(struct pci_dev *dev)`
`3726`	`3726`	`{`
`3727`		`- if ((dev->device & 0xffc0) == 0x2340)`
	`3727`	`+ if ((dev->device & 0xffc0) == 0x2340 \|\| dev->device == 0x1eb8)`
`3728`	`3728`	`quirk_no_bus_reset(dev);`
`3729`	`3729`	`}`
`3730`	`3730`	`DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,`