f2fs: wake up all waiters in f2fs_submit_discard_endio

There could be more than one waiter waiting discard IO completion, so we
need use complete_all() instead of complete() in f2fs_submit_discard_endio
to avoid hungtask.

Fixes: 	ec9895add2c5 ("f2fs: don't hold cmd_lock during waiting discard
command")
Cc: <stable@vger.kernel.org>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 22cca269909552556d2f0e9df478d933721798fa..24a2d5ab6f456379cdabb2e5a58323a3b166517e 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -752,7 +752,7 @@ static void f2fs_submit_discard_endio(struct bio *bio)
 
        dc->error = bio->bi_error;
        dc->state = D_DONE;
-       complete(&dc->wait);
+       complete_all(&dc->wait);
        bio_put(bio);
 }