[PATCH] mtd: block2mtd: fix recursive call of mtd_writev

[Gabor Juhos]

The 'mtd_writev' interface calls the function assigned
to the '_write' field of a given mtd device if that is
not NULL. The block2mtd driver sets the '_writev' field
to the 'mtd_writev' function itself and thus causes a
endless loop.

This is caused by 1dbebd32562b3c2caeca35960e5cb00bfcc12900
(mtd: harmonize mtd_writev usage).

Remove the assignment from the block2mtd driver to fix the
issue.

Signed-off-by: Gabor Juhos <juhosg at openwrt.org>
Cc: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>
Cc: stable at vger.kernel.org

---
An identical patch has been tested on 3.3.7, but the actual
one is not even compile tested.
---
 drivers/mtd/devices/block2mtd.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index a4a80b7..7d7000d 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -271,7 +271,6 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
 	dev->mtd.flags = MTD_CAP_RAM;
 	dev->mtd._erase = block2mtd_erase;
 	dev->mtd._write = block2mtd_write;
-	dev->mtd._writev = mtd_writev;
 	dev->mtd._sync = block2mtd_sync;
 	dev->mtd._read = block2mtd_read;
 	dev->mtd.priv = dev;
-- 
1.7.2.1