[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, 5 insertions, 2 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d71c31df7fdf..4970f47be72c 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -575,8 +575,11 @@ static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
 { 
         unsigned char revid, tmp;
         
-        pci_msi_quirk = 1;
-        printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
+        if (dev->subordinate) {
+                printk(KERN_WARNING "PCI: MSI quirk detected. "
+                       "PCI_BUS_FLAGS_NO_MSI set for subordinate bus.\n");
+                dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
+        }
 
         if (nr_ioapics == 0) 
                 return;