[ 45/82] mtd: block2mtd: fix recursive call of mtd_writev

[Greg KH]

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

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

From: Gabor Juhos <juhosg@xxxxxxxxxxx>

commit 2e24e32e2759348c9290404abad4f729f791bfad upstream.

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@xxxxxxxxxxx>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/mtd/devices/block2mtd.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -271,7 +271,6 @@ static struct block2mtd_dev *add_device(
 	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;


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