NAND: Wrong calculation of page number in nand_block_bad()

In case that there is no memory based bad block table available the
function nand_block_checkbad() in drivers/mtd/nand/nand_base.c will call
nand_block_bad() directly. When parameter 'getchip' is set to zero,
nand_block_bad() will not right shift the offset to calculate the
correct page number.

Signed-off-by: Thomas Knobloch <knobloch@siemens.com>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/nand/nand_base.c b/drivers/nand/nand_base.c
index 8495829..c6fee18 100644 (file)
--- a/drivers/nand/nand_base.c
+++ b/drivers/nand/nand_base.c
@@ -427,8 +427,9 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
        struct nand_chip *this = mtd->priv;
        u16 bad;
 
+       page = (int)(ofs >> this->page_shift) & this->pagemask;
+
        if (getchip) {
-               page = (int)(ofs >> this->page_shift);
                chipnr = (int)(ofs >> this->chip_shift);
 
                /* Grab the lock and see if the device is available */
@@ -436,18 +437,17 @@ static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
 
                /* Select the NAND device */
                this->select_chip(mtd, chipnr);
-       } else
-               page = (int) ofs;
+       }
 
        if (this->options & NAND_BUSWIDTH_16) {
-               this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page & this->pagemask);
+               this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos & 0xFE, page);
                bad = cpu_to_le16(this->read_word(mtd));
                if (this->badblockpos & 0x1)
                        bad >>= 1;
                if ((bad & 0xFF) != 0xff)
                        res = 1;
        } else {
-               this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos, page & this->pagemask);
+               this->cmdfunc (mtd, NAND_CMD_READOOB, this->badblockpos, page);
                if (this->read_byte(mtd) != 0xff)
                        res = 1;
        }