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| author | Sumit Semwal <sumit.semwal@linaro.org> | 2017-03-25 21:48:11 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:35:20 +0200 |
| commit | bcbdcf48469b062b6ee00b560b44de28f387d2e0 (patch) | |
| tree | c328491bd323777989ffe9d7195d600c08c628be /drivers/pci/pci.c | |
| parent | d4f09ea7e35c02a765f58e900fbc159ff00c70e2 (diff) | |
| download | linux-stable-bcbdcf48469b062b6ee00b560b44de28f387d2e0.tar.gz linux-stable-bcbdcf48469b062b6ee00b560b44de28f387d2e0.tar.bz2 linux-stable-bcbdcf48469b062b6ee00b560b44de28f387d2e0.zip | |
PCI: Ignore BAR updates on virtual functions
From: Bjorn Helgaas <bhelgaas@google.com>
[ 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>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
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 a01e6d5fedec..0e53488f8ec1 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -519,10 +519,6 @@ 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); } |