[PATCH] dm: add missing unlock on in dm_keyslot_evict()

[Dan Carpenter]

We need to call dm_put_live_table() even if dm_get_live_table() returns
NULL.

Fixes: 9355a9eb21a5 ("dm: support key eviction from keyslot managers of 
underlying devices")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/md/dm-table.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 933e01f3fab4..1a7e2623069b 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1177,7 +1177,7 @@ static int dm_keyslot_evict(struct blk_crypto_profile 
*profile,
 
        t = dm_get_live_table(md, &srcu_idx);
        if (!t)
-               return 0;
+               goto put_live_table;
 
        for (unsigned int i = 0; i < t->num_targets; i++) {
                struct dm_target *ti = dm_table_get_target(t, i);
@@ -1188,6 +1188,7 @@ static int dm_keyslot_evict(struct blk_crypto_profile 
*profile,
                                          (void *)key);
        }
 
+put_live_table:
        dm_put_live_table(md, srcu_idx);
        return 0;
 }
-- 
2.47.2