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| author |   Wei Yang <weiyang@linux.vnet.ibm.com> | 2015-07-29 16:52:58 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2015-09-14 10:34:17 -0500 |
| commit | 70675e0b6a1ae20f8e93f9fc083d28034ad38948 (patch) | |
| tree | 8c4a3b6aae3923359680668ad98fcf18f43957fb /drivers/pci/setup-res.c | |
| parent | Linux 4.3-rc1 (diff) | |
| download | linux-dev-70675e0b6a1ae20f8e93f9fc083d28034ad38948.tar.xz linux-dev-70675e0b6a1ae20f8e93f9fc083d28034ad38948.zip | |
PCI: Don't try to restore VF BARs
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.
Don't update VF BARs in pci_restore_bars().
This avoids spurious "BAR %d: error updating" messages that we see when
doing vfio pass-through after 6eb7018705de ("vfio-pci: Move idle devices to
D3hot power state").
[bhelgaas: changelog, fix whitespace]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/setup-res.c')
| -rw-r--r-- | drivers/pci/setup-res.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 232f9254c11a..152de5cd1cfc 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -36,6 +36,11 @@ void pci_update_resource(struct pci_dev *dev, int resno) enum pci_bar_type type; struct resource *res = dev->resource + resno; + if (dev->is_virtfn) { + dev_warn(&dev->dev, "can't update VF BAR%d\n", resno); + return; + } + /* * Ignore resources for unimplemented BARs and unused resource slots * for 64 bit BARs. |