From: Chao Yu <yuchao0@huawei.com>
Date: Fri, 19 May 2017 15:46:44 +0000 (+0800)
Subject: f2fs: wake up all waiters in f2fs_submit_discard_endio
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e31b98215779e66a490471c6ad886ae231316699;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 22cca2699095..24a2d5ab6f45 100644
--- 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);
 }