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authorAlexander Duyck <aduyck@mirantis.com>2015-10-30 00:21:16 +0300
committerBjorn Helgaas <bhelgaas@google.com>2015-10-30 23:14:56 +0300
commitb390864482924a21f8d7e25636d0140de93fba7e (patch)
treedf4887ac9ea9c5c098474654aef3218f51b6030f /drivers/pci
parenta39e3fcd72356e2bcb46fd99ec4e98064bd806b2 (diff)
downloadlinux-b390864482924a21f8d7e25636d0140de93fba7e.tar.xz
PCI: Wait 1 second between disabling VFs and clearing NumVFs
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@mirantis.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/iov.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index fada98da731b..24428d5f60cd 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;
}