linux-kernel - [PATCH 3.16 042/217] mtd: onenand: fix deadlock in onenand_block

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Message-ID: <lsq.1461711741.957696563@decadent.org.uk>
Date:	Wed, 27 Apr 2016 01:02:21 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Brian Norris" <computersforpeace@...il.com>,
	"Aaro Koskinen" <aaro.koskinen@....fi>,
	"Artem Bityutskiy" <artem.bityutskiy@...ux.intel.com>
Subject: [PATCH 3.16 042/217] mtd: onenand: fix deadlock in
 onenand_block_markbad

3.16.35-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Aaro Koskinen <aaro.koskinen@....fi>

commit 5e64c29e98bfbba1b527b0a164f9493f3db9e8cb upstream.

Commit 5942ddbc500d ("mtd: introduce mtd_block_markbad interface")
incorrectly changed onenand_block_markbad() to call mtd_block_markbad
instead of onenand_chip's block_markbad function. As a result the function
will now recurse and deadlock. Fix by reverting the change.

Fixes: 5942ddbc500d ("mtd: introduce mtd_block_markbad interface")
Signed-off-by: Aaro Koskinen <aaro.koskinen@....fi>
Acked-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@...il.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/mtd/onenand/onenand_base.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -2605,6 +2605,7 @@ static int onenand_default_block_markbad
  */
 static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
 {
+	struct onenand_chip *this = mtd->priv;
 	int ret;
 
 	ret = onenand_block_isbad(mtd, ofs);
@@ -2616,7 +2617,7 @@ static int onenand_block_markbad(struct
 	}
 
 	onenand_get_device(mtd, FL_WRITING);
-	ret = mtd_block_markbad(mtd, ofs);
+	ret = this->block_markbad(mtd, ofs);
 	onenand_release_device(mtd);
 	return ret;
 }