linux-kernel - [PATCH 3.14 60/83] mtd: diskonchip: mem resource name is not optional

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Message-Id: <20140511191914.895049228@linuxfoundation.org>
Date:	Sun, 11 May 2014 21:20:01 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Sasha Levin <sasha.levin@...cle.com>,
	Alexander Shiyan <shc_work@...l.ru>,
	Brian Norris <computersforpeace@...il.com>
Subject: [PATCH 3.14 60/83] mtd: diskonchip: mem resource name is not optional

3.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Sasha Levin <sasha.levin@...cle.com>

commit 86e4bbc766b9456f583f2fc3c4f6c623b422af88 upstream.

Passing a name to request_mem_region() isn't optional and can't just
be NULL. Passing NULL causes a NULL ptr deref later in the boot
process.

Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
Tested-by: Alexander Shiyan <shc_work@...l.ru>
Signed-off-by: Brian Norris <computersforpeace@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/nand/diskonchip.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -1438,7 +1438,7 @@ static int __init doc_probe(unsigned lon
 	int reg, len, numchips;
 	int ret = 0;
 
-	if (!request_mem_region(physadr, DOC_IOREMAP_LEN, NULL))
+	if (!request_mem_region(physadr, DOC_IOREMAP_LEN, "DiskOnChip"))
 		return -EBUSY;
 	virtadr = ioremap(physadr, DOC_IOREMAP_LEN);
 	if (!virtadr) {


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