dm: fix double RCU unlock in dm_dax_zero_page_range() error path

commit f05c4403db5bba881d4964e731f6da35be46aabd upstream.

Remove redundant dm_put_live_table() in dm_dax_zero_page_range() error
path to fix sparse warning:
drivers/md/dm.c:1208:9: warning: context imbalance in 'dm_dax_zero_page_range' - unexpected unlock

Fixes: cdf6cdcd3b99a ("dm,dax: Add dax zero_page_range operation")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 95fcce30e2365605e9919404a353884045cd3678..7f293a9247deb80bf81ad13ed570fca1615cfd39 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1219,11 +1219,9 @@ static int dm_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff,
                 * ->zero_page_range() is mandatory dax operation. If we are
                 *  here, something is wrong.
                 */
-               dm_put_live_table(md, srcu_idx);
                goto out;
        }
        ret = ti->type->dax_zero_page_range(ti, pgoff, nr_pages);
-
  out:
        dm_put_live_table(md, srcu_idx);