linux-kernel - [PATCH] PCI: Mark NVIDIA T4 GPUs to avoid bus reset

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Message-Id: <2dcebea53a6eb9bd212ec6d8974af2e5e0333ef6.1681129861.git.wuzongyong@linux.alibaba.com>
Date:   Mon, 10 Apr 2023 20:34:11 +0800
From:   Wu Zongyong <wuzongyong@...ux.alibaba.com>
To:     lukas@...ner.de, sdonthineni@...dia.com, bhelgaas@...gle.com,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Wu Zongyong <wuzongyong@...ux.alibaba.com>,
        wllenyj@...ux.alibaba.com, wutu.xq2@...ux.alibaba.com,
        gerry@...ux.alibaba.com
Subject: [PATCH] PCI: Mark NVIDIA T4 GPUs to avoid bus reset

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

Fixes: 4c207e7121fa ("PCI: Mark some NVIDIA GPUs to avoid bus reset")
Signed-off-by: Wu Zongyong <wuzongyong@...ux.alibaba.com>
---
 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 44cab813bf95..be86b93b9e38 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3618,7 +3618,7 @@ 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,
-- 
2.34.3