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