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authorAlvaro Karsz <alvaro.karsz@solid-run.com>2023-01-10 17:56:37 +0100
committerMichael S. Tsirkin <mst@redhat.com>2023-02-21 01:26:55 +0100
commitd089d69cc1f824936eeaa4fa172f8fa1a0949eaa (patch)
treee17c7b2863cc11862ea87ef0bf146f2b7cb2a37d /drivers/pci/quirks.c
parentPCI: Add SolidRun vendor ID (diff)
downloadlinux-d089d69cc1f824936eeaa4fa172f8fa1a0949eaa.tar.xz
linux-d089d69cc1f824936eeaa4fa172f8fa1a0949eaa.zip
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 <alvaro.karsz@solid-run.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com> Message-Id: <20230110165638.123745-3-alvaro.karsz@solid-run.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to '')
-rw-r--r--drivers/pci/quirks.c8
1 files changed, 8 insertions, 0 deletions
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);