net/9p: fix error path of p9_virtio_probe

Currently when virtio_find_single_vq fails, we go through del_vqs which
throws a warning (Trying to free already-free IRQ).  Skip del_vqs if vq
allocation failed.

Link: http://lkml.kernel.org/r/20180524101021.49880-1-jean-philippe.brucker@arm.com
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 05006cbb3361..eaacce086427 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -563,7 +563,7 @@ static int p9_virtio_probe(struct virtio_device *vdev)
         chan->vq = virtio_find_single_vq(vdev, req_done, "requests");
         if (IS_ERR(chan->vq)) {
                 err = PTR_ERR(chan->vq);
-                goto out_free_vq;
+                goto out_free_chan;
         }
         chan->vq->vdev->priv = chan;
         spin_lock_init(&chan->lock);
@@ -616,6 +616,7 @@ out_free_tag:
         kfree(tag);
 out_free_vq:
         vdev->config->del_vqs(vdev);
+out_free_chan:
         kfree(chan);
 fail:
         return err;