diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2016-11-28 11:19:27 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-11-28 11:37:56 -0600 |
| commit | 63880b230a4af502c56dde3d4588634c70c66006 (patch) | |
| tree | 47cd7eb55cd6d8c8366ef316bc1795bf9233a127 /drivers/pci/pci.c | |
| parent | f40ec3c748c6912f6266c56a7f7992de61b255ed (diff) | |
PCI: Ignore BAR updates on virtual functions
VF BARs are read-only zero, so updating VF BARs will not have any effect.
See the SR-IOV spec r1.1, sec 3.4.1.11.
We already ignore these updates because of 70675e0b6a1a ("PCI: Don't try to
restore VF BARs"); this merely restructures it slightly to make it easier
to split updates for standard and SR-IOV BARs.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ba34907538f6..631eac2bed78 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -564,10 +564,6 @@ static void pci_restore_bars(struct pci_dev *dev) { int i; - /* Per SR-IOV spec 3.4.1.11, VF BARs are RO zero */ - if (dev->is_virtfn) - return; - for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) pci_update_resource(dev, i); } |