linux-kernel - [PATCH 2/3] f2fs: wake up all waiters in f2fs_submit_discard

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Date:   Fri, 19 May 2017 23:46:44 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <yuchao0@...wei.com>,
        stable@...r.kernel.org
Subject: [PATCH 2/3] f2fs: wake up all waiters in f2fs_submit_discard_endio

From: Chao Yu <yuchao0@...wei.com>

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@...r.kernel.org>
Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/segment.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index d310b82caef1..2b11119d9071 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -751,7 +751,7 @@ 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);
 }
 
-- 
2.12.2.575.gb14f27f