1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index ed9447aee863..b5b83331da26 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5049,6 +5049,15 @@ void pci_reassigndev_resource_alignment(struct pci_dev *dev)
         resource_size_t align, size;
         u16 command;
 
+        /*
+         * VF BARs are read-only zero according to SR-IOV spec r1.1, sec
+         * 3.4.1.11.  Their resources are allocated from the space
+         * described by the VF BARx register in the PF's SR-IOV capability.
+         * We can't influence their alignment here.
+         */
+        if (dev->is_virtfn)
+                return;
+
         /* check if specified PCI is target device to reassign */
         align = pci_specified_resource_alignment(dev);
         if (!align)