diff options
| author | Alvaro Karsz <alvaro.karsz@solid-run.com> | 2023-01-10 18:56:37 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-02-20 19:26:55 -0500 |
| commit | d089d69cc1f824936eeaa4fa172f8fa1a0949eaa (patch) | |
| tree | e17c7b2863cc11862ea87ef0bf146f2b7cb2a37d /drivers/pci | |
| parent | db6c4dee4c104f50ed163af71c53bfdb878a8318 (diff) | |
| download | lwn-d089d69cc1f824936eeaa4fa172f8fa1a0949eaa.tar.gz lwn-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 'drivers/pci')
| -rw-r--r-- | drivers/pci/quirks.c | 8 |
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); |