[PATCH] PCI: make MSI quirk inheritable from the pci bus

It turns out AMD 8131 quirk only affects MSI for devices behind the 8131 bridge.
Handle this by adding a flags field in pci_bus, inherited from parent to child.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d5a67c1bcb98..4de1c17ee573 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -703,6 +703,9 @@ int pci_enable_msi(struct pci_dev* dev)
         if (dev->no_msi)
                 return status;
 
+        if (dev->bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+                return -EINVAL;
+
         temp = dev->irq;
 
         status = msi_init();