[MTD] [NAND] Casting bug in nand_default_block_markbad

There is a slight bug in nand_default_block_markbad, where the offset is
cast to an integer, prior to being shifted. This means that on large
offsets, it is incorrectly doing a signed shift & losing bits. Fixed
this by doing the cast after the shift (as is done elsewhere in the code).

Signed-off-by: Andre Renaud <andre@bluewatersys.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 5b96f1c..ab3b2d1 100644 (file)
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -350,7 +350,7 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
        int block, ret;
 
        /* Get block number */
-       block = ((int)ofs) >> chip->bbt_erase_shift;
+       block = (int)(ofs >> chip->bbt_erase_shift);
        if (chip->bbt)
                chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);