From d089d69cc1f824936eeaa4fa172f8fa1a0949eaa Mon Sep 17 00:00:00 2001 From: Alvaro Karsz Date: Tue, 10 Jan 2023 18:56:37 +0200 Subject: PCI: Avoid FLR for SolidRun SNET DPU rev 1 This patch fixes a FLR bug on the SNET DPU rev 1 by setting the PCI_DEV_FLAGS_NO_FLR_RESET flag. As there is a quirk to avoid FLR (quirk_no_flr), I added a new quirk to check the rev ID before calling to quirk_no_flr. Without this patch, a SNET DPU rev 1 may hang when FLR is applied. Signed-off-by: Alvaro Karsz Acked-by: Bjorn Helgaas Message-Id: <20230110165638.123745-3-alvaro.karsz@solid-run.com> Signed-off-by: Michael S. Tsirkin --- drivers/pci/quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/pci') diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 285acc4aaccc..809d03272c20 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5343,6 +5343,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x149c, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_no_flr); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_no_flr); +/* FLR may cause the SolidRun SNET DPU (rev 0x1) to hang */ +static void quirk_no_flr_snet(struct pci_dev *dev) +{ + if (dev->revision == 0x1) + quirk_no_flr(dev); +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SOLIDRUN, 0x1000, quirk_no_flr_snet); + static void quirk_no_ext_tags(struct pci_dev *pdev) { struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus); -- cgit v1.2.3