linux-kernel - [241/262] mtd: mtdchar: add missing initializer on raw write

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Date:	Wed, 09 Nov 2011 13:29:23 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Peter Wippich <pewi@...instruments.de>,
	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Subject: [241/262] mtd: mtdchar: add missing initializer on raw write

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

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

From: Peter Wippich <pewi@...instruments.de>

commit bf5140817b2d65faac9b32fc9057a097044ac35b upstream.

On writes in MODE_RAW the mtd_oob_ops struct is not sufficiently
initialized which may cause nandwrite to fail. With this patch
it is possible to write raw nand/oob data without additional ECC
(either for testing or when some sectors need different oob layout
e.g. bootloader) like
nandwrite  -n -r -o  /dev/mtd0 <myfile>

Signed-off-by: Peter Wippich <pewi@...instruments.de>
Tested-by: Ricard Wanderlof <ricardw@...s.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mtd/mtdchar.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -320,6 +320,7 @@ static ssize_t mtd_write(struct file *fi
 			ops.mode = MTD_OOB_RAW;
 			ops.datbuf = kbuf;
 			ops.oobbuf = NULL;
+			ops.ooboffs = 0;
 			ops.len = len;
 
 			ret = mtd->write_oob(mtd, *ppos, &ops);


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