[PATCH 1/1] kvm: fix irq 0 assignment

[Sheng Yang <sheng@linux.intel.com>]

Shouldn't update assigned irq if host irq is 0, which means uninitialized
or don't support INTx.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 qemu/hw/device-assignment.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c
index b7cbcec..cfbf39d 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -521,6 +521,10 @@ static int assign_irq(AssignedDevInfo *adev)
     AssignedDevice *dev = adev->assigned_dev;
     int irq, r = 0;
 
+    /* irq 0 means uninitialized */
+    if (dev->real_device.irq == 0)
+        return 0;
+
     irq = pci_map_irq(&dev->dev, dev->intpin);
     irq = piix_get_irq(irq);
 
-- 
1.5.4.5