From: Michael S. Tsirkin <mst@redhat.com>
Date: Wed, 18 Jan 2012 18:07:09 +0000 (+0200)
Subject: KVM: fix error handling for out of range irq
X-Git-Tag: v3.4-rc1~59^2~50
X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=b93a35532767a2cf78bdbc88730d5c28aa66b941;p=~andy%2Flinux

KVM: fix error handling for out of range irq

find_index_from_host_irq returns 0 on error
but callers assume < 0 on error. This should
not matter much: an out of range irq should never happen since
irq handler was registered with this irq #,
and even if it does we get a spurious msix irq in guest
and typically nothing terrible happens.

Still, better to make it consistent.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index 758e3b36d4c..ece80612b59 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -49,10 +49,8 @@ static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
 			index = i;
 			break;
 		}
-	if (index < 0) {
+	if (index < 0)
 		printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
-		return 0;
-	}
 
 	return index;
 }