drm/nouveau: fix another lock unbalance in nouveau_crtc_page_flip
commit
806cbc5026933a781b66adecf6d1658fde9138e6 upstream.
Fixes a regression introduced by
060810d7abaabca "drm/nouveau: fix locking
issues in page flipping paths". chan->cli->mutex is unlocked a second time
in the fail_unreserve path, fix this by moving mutex_unlock down.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>