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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
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@ -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++) {