On Thu, Oct 29, 2015 at 05:23:22PM -0500, Bjorn Helgaas wrote: >From: Alexander Duyck <aduyck@xxxxxxxxxxxx> > >Per sec 3.3.3.1 of the SR-IOV spec, r1.1, we must allow 1.0s after clearing >VF Enable before reading any field in the SR-IOV Extended Capability. > >Wait 1 second before calling pci_iov_set_numvfs(), which reads >PCI_SRIOV_VF_OFFSET and PCI_SRIOV_VF_STRIDE after it sets PCI_SRIOV_NUM_VF. > >[bhelgaas: split to separate patch for reviewability, add spec reference] >Signed-off-by: Alexander Duyck <aduyck@xxxxxxxxxxxx> >Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Reviewed-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx> >--- > drivers/pci/iov.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c >index fada98d..24428d5 100644 >--- a/drivers/pci/iov.c >+++ b/drivers/pci/iov.c >@@ -339,13 +339,13 @@ failed: > iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); > pci_cfg_access_lock(dev); > pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); >- pci_iov_set_numvfs(dev, 0); > ssleep(1); > pci_cfg_access_unlock(dev); > > if (iov->link != dev->devfn) > sysfs_remove_link(&dev->dev.kobj, "dep_link"); > >+ pci_iov_set_numvfs(dev, 0); > return rc; > } > -- Richard Yang Help you, Help me -- 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
