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| author | Sasha Neftin <sasha.neftin@intel.com> | 2017-04-03 16:02:50 -0500 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-03 16:02:50 -0500 |
| commit | f65fd1aa4f9881d5540192d11f7b8ed2fec936db (patch) | |
| tree | a6a61973770b1c570019cd9b6218983f3b020b65 /drivers/pci/quirks.c | |
| parent | c1ae3cfa0e89fa1a7ecc4c99031f5e9ae99d9201 (diff) | |
| download | op-kernel-dev-f65fd1aa4f9881d5540192d11f7b8ed2fec936db.zip op-kernel-dev-f65fd1aa4f9881d5540192d11f7b8ed2fec936db.tar.gz | |
PCI: Avoid FLR for Intel 82579 NICs
Per Intel Specification Update 335553-002 (see link below), some 82579
network adapters advertise a Function Level Reset (FLR) capability, but
they can hang when an FLR is triggered.
To reproduce the problem, attach the device to a VM, then detach and try to
attach again.
Add a quirk to prevent the use of FLR on these devices.
[bhelgaas: changelog, comments]
Link: http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/82579lm-82579v-gigabit-network-connection-spec-update.pdf
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
| -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 f754453..823271b 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4633,3 +4633,11 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2030, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2031, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2032, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2033, quirk_no_aersid); + +/* FLR may cause some 82579 devices to hang. */ +static void quirk_intel_no_flr(struct pci_dev *dev) +{ + dev->dev_flags |= PCI_DEV_FLAGS_NO_FLR_RESET; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_intel_no_flr); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_intel_no_flr); |
