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>

1 files changed, 1 insertions, 3 deletions

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;
 }