virtio: return ENOMEM on out of memory

add_buf returns ring size on out of memory,
this is not what devices expect.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org # .34.x
This commit is contained in:
Michael S. Tsirkin 2010-06-10 18:16:11 +03:00 committed by Rusty Russell
parent 7e27d6e778
commit 686d363786

View file

@ -119,7 +119,7 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
desc = kmalloc((out + in) * sizeof(struct vring_desc), gfp);
if (!desc)
return vq->vring.num;
return -ENOMEM;
/* Transfer entries from the sg list into the indirect page */
for (i = 0; i < out; i++) {