mptable: Reset pinmask on new bus or device.

Fix small possibility of bus changing without device changing.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/pci.h b/src/pci.h
index a0b6b9c3..3c04529f 100644
--- a/src/pci.h
+++ b/src/pci.h
@@ -9,6 +9,9 @@ static inline u8 pci_bdf_to_bus(u16 bdf) {
 static inline u8 pci_bdf_to_devfn(u16 bdf) {
     return bdf & 0xff;
 }
+static inline u16 pci_bdf_to_busdev(u16 bdf) {
+    return bdf & ~0x07;
+}
 static inline u8 pci_bdf_to_dev(u16 bdf) {
     return (bdf >> 3) & 0x1f;
 }