mtd: block2mtd: initialize writebufsize

The writebufsize concept was introduce by commit
"0e4ca7e mtd: add writebufsize field to mtd_info struct" and it represents
the maximum amount of data the device writes to the media at a time. This is
an important parameter for UBIFS which is used during recovery and which
basically defines how big a corruption caused by a power cut can be.

However, we forgot to set this parameter for block2mtd. Set it to PAGE_SIZE
because this is actually the amount of data we write at a time.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: Joern Engel <joern@lazybastard.org>
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index d9e75dafdd45..0fccf149f5aa 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -283,6 +283,7 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
         dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
         dev->mtd.erasesize = erase_size;
         dev->mtd.writesize = 1;
+        dev->mtd.writebufsize = PAGE_SIZE;
         dev->mtd.type = MTD_RAM;
         dev->mtd.flags = MTD_CAP_RAM;
         dev->mtd._erase = block2mtd_erase;