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authorShanker Donthineni <sdonthineni@nvidia.com>2021-06-08 08:48:56 +0300
committerBjorn Helgaas <bhelgaas@google.com>2021-06-18 18:32:35 +0300
commit4c207e7121fa92b66bf1896bf8ccb9edfb0f9731 (patch)
tree4271e9bdd19b41143264ecac336e2e847eaca983 /drivers/pci/quirks.c
parentb5cf198e74a91073d12839a3e2db99994a39995d (diff)
downloadlinux-4c207e7121fa92b66bf1896bf8ccb9edfb0f9731.tar.xz
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: Shanker Donthineni <sdonthineni@nvidia.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Sinan Kaya <okaya@kernel.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index de0c110029f3..08a87161f3c8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3547,6 +3547,18 @@ static void quirk_no_bus_reset(struct pci_dev *dev)
}
/*
+ * 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
* regardless of AER, config space of the device is never accessible again