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| author | Bjorn Helgaas <bhelgaas@google.com> | 2017-03-17 00:48:24 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-22 11:43:37 (GMT) |
| commit | 3d58444dea81ba0556ffcb356a19fc2d224d4eac (patch) | |
| tree | f551e4d46fcf8e30baf1e49cd43027e7746391cc /drivers/pci/pci.c | |
| parent | 74cce811a4b60d64c5c30496f326ecd18a72a6b2 (diff) | |
| download | linux-3d58444dea81ba0556ffcb356a19fc2d224d4eac.tar.xz | |
PCI: Ignore BAR updates on virtual functions
[ Upstream commit 63880b230a4af502c56dde3d4588634c70c66006 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 1fc2cf4..6922964 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); } |