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List:       kvm
Subject:    [PATCH 1/3] kvm: fix irq 0 assignment
From:       Sheng Yang <sheng () linux ! intel ! com>
Date:       2009-03-04 7:54:27
Message-ID: 1236153269-8825-2-git-send-email-sheng () linux ! intel ! com
[Download RAW message or body]

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 32fba2a..7f9c789 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -574,6 +574,10 @@ 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

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