linux-kernel - [PATCH AUTOSEL 5.4 09/20] fat: add ratelimit to fat*_ent

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Message-Id: <20220601135902.2004823-9-sashal@kernel.org>
Date:   Wed,  1 Jun 2022 09:58:51 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
        qianfan <qianfanguijin@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.4 09/20] fat: add ratelimit to fat*_ent_bread()

From: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>

[ Upstream commit 183c3237c928109d2008c0456dff508baf692b20 ]

fat*_ent_bread() can be the cause of too many report on I/O error path.
So use fat_msg_ratelimit() instead.

Link: https://lkml.kernel.org/r/87bkxogfeq.fsf@mail.parknet.co.jp
Signed-off-by: OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
Reported-by: qianfan <qianfanguijin@....com>
Tested-by: qianfan <qianfanguijin@....com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/fat/fatent.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 3647c65a0f48..0191eb1dc7f6 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -93,7 +93,8 @@ static int fat12_ent_bread(struct super_block *sb, struct fat_entry *fatent,
 err_brelse:
 	brelse(bhs[0]);
 err:
-	fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)", (llu)blocknr);
+	fat_msg_ratelimit(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
+			  (llu)blocknr);
 	return -EIO;
 }
 
@@ -106,8 +107,8 @@ static int fat_ent_bread(struct super_block *sb, struct fat_entry *fatent,
 	fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
 	fatent->bhs[0] = sb_bread(sb, blocknr);
 	if (!fatent->bhs[0]) {
-		fat_msg(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
-		       (llu)blocknr);
+		fat_msg_ratelimit(sb, KERN_ERR, "FAT read failed (blocknr %llu)",
+				  (llu)blocknr);
 		return -EIO;
 	}
 	fatent->nr_bhs = 1;
-- 
2.35.1