4.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chao Yu <yuchao0@xxxxxxxxxx>
commit e31b98215779e66a490471c6ad886ae231316699 upstream.
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")
Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/segment.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -751,7 +751,7 @@ static void f2fs_submit_discard_endio(st
dc->error = bio->bi_error;
dc->state = D_DONE;
- complete(&dc->wait);
+ complete_all(&dc->wait);
bio_put(bio);
}