From 2f0969c0be3ef16e9de84f536761917d88e7f85f Mon Sep 17 00:00:00 2001 From: Shanker Donthineni Date: Tue, 8 Jun 2021 11:18:56 +0530 Subject: [PATCH] PCI: Mark some NVIDIA GPUs to avoid bus reset commit 4c207e7121fa92b66bf1896bf8ccb9edfb0f9731 upstream. 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: Shanker Donthineni Signed-off-by: Bjorn Helgaas Reviewed-by: Sinan Kaya Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/pci/quirks.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 77874187f5b3..096ba11ac105 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3345,6 +3345,18 @@ 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