s390/virtio: handle find on invalid queue gracefully

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A queue with a capacity of zero is clearly not a valid virtio queue.
Some emulators report zero queue size if queried with an invalid queue
index. Instead of crashing in this case let us just return -ENOENT. To
make that work properly, let us fix the notifier cleanup logic as well.

Cc: stable@vger.kernel.org
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Halil Pasic 2019-01-21 13:19:43 +01:00 • committed by Michael S. Tsirkin

parent 8457fdfeb1

commit 3438b2c039

1 changed files with 3 additions and 1 deletions

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drivers/s390/virtio/virtio_ccw.c

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