VF BARs are RO zero, so updating VF BARs will not take any effect. See the SR-IOV spec r1.1, sec 3.4.1.11. Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx> --- drivers/pci/setup-res.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 232f925..334b394 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -37,6 +37,13 @@ void pci_update_resource(struct pci_dev *dev, int resno) struct resource *res = dev->resource + resno; /* + * Per SRIOV SPEC 3.4.1.11, VF BARs are RO zero. + * If this is a VF, just return. + */ + if (dev->is_virtfn) + return; + + /* * Ignore resources for unimplemented BARs and unused resource slots * for 64 bit BARs. */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
