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[14/16] kvm: fix interrupt pin 0 assignment

Message ID 1237261817-27955-15-git-send-email-sheng@linux.intel.com (mailing list archive)
State Accepted
Headers show

Commit Message

Sheng Yang March 17, 2009, 3:50 a.m. UTC 
Shouldn't update assigned irq if assigned device's interrupt pin 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(-)
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Patch

diff --git a/qemu/hw/device-assignment.c b/qemu/hw/device-assignment.c
index b0b90c1..411ccc5 100644
--- a/qemu/hw/device-assignment.c
+++ b/qemu/hw/device-assignment.c
@@ -590,6 +590,10 @@  static int assign_irq(AssignedDevInfo *adev)
     AssignedDevice *dev = adev->assigned_dev;
     int irq, r = 0;
 
+    /* Interrupt PIN 0 means don't use INTx */
+    if (pci_read_byte(dev->pdev, PCI_INTERRUPT_PIN) == 0)
+        return 0;
+
     irq = pci_map_irq(&dev->dev, dev->intpin);
     irq = piix_get_irq(irq);