Commit 4c207e71 authored by Shanker Donthineni's avatar Shanker Donthineni Committed by Bjorn Helgaas
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PCI: Mark some NVIDIA GPUs to avoid bus reset 

Some NVIDIA GPU devices do not work with SBR.  Triggering SBR leaves the
device inoperable for the current system boot. It requires a system
hard-reboot to get the GPU device back to normal operating condition
post-SBR. For the affected devices, enable NO_BUS_RESET quirk to avoid the
issue.

This issue will be fixed in the next generation of hardware.

Link: https://lore.kernel.org/r/20210608054857.18963-8-ameynarkhede03@gmail.com


Signed-off-by: default avatarShanker Donthineni <sdonthineni@nvidia.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarSinan Kaya <okaya@kernel.org>
Cc: stable@vger.kernel.org
parent b5cf198e

drivers/pci/quirks.c

+12 −0
Original line number Diff line number Diff line
@@ -3546,6 +3546,18 @@ static void quirk_no_bus_reset(struct pci_dev *dev) 
	dev->dev_flags |= PCI_DEV_FLAGS_NO_BUS_RESET;

}



/*

 * Some NVIDIA GPU devices do not work with bus reset, SBR needs to be

 * prevented for those affected devices.

 */

static void quirk_nvidia_no_bus_reset(struct pci_dev *dev)

{

	if ((dev->device & 0xffc0) == 0x2340)

		quirk_no_bus_reset(dev);

}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,

			 quirk_nvidia_no_bus_reset);



/*

 * Some Atheros AR9xxx and QCA988x chips do not behave after a bus reset.

 * The device will throw a Link Down error on AER-capable systems and