md/raid10: avoid memory leak on error path during reshape.

If raid10 reshape fails to find somewhere to read a block
from, it returns without freeing memory...

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index a46124ecafc7..e5037e2aadd3 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4399,6 +4399,7 @@ read_more:
 		 * on all the target devices.
 		 */
 		// FIXME
+		mempool_free(r10_bio, conf->r10buf_pool);
 		set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 		return sectors_done;
 	}