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[MTD] OneNAND: Do not allow oob write past end of page

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OneNAND can write oob to successive pages, but NAND
does not do that.  For compatibility, disallow OneNAND
from writing past the end of the page.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
This commit is contained in:
Adrian Hunter 2007-02-06 09:15:39 +09:00 committed by Kyungmin Park
parent 5b4246f1b0
commit 52e4200a6d
1 changed files with 7 additions and 0 deletions
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7
drivers/mtd/onenand/onenand_base.c
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@ -1186,6 +1186,13 @@ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
return -EINVAL; return -EINVAL;
} }
/* For compatibility with NAND: Do not allow write past end of page */
if (column + len > oobsize) {
DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: "
"Attempt to write past end of page\n");
return -EINVAL;
}
/* Do not allow reads past end of device */ /* Do not allow reads past end of device */
if (unlikely(to >= mtd->size || if (unlikely(to >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) - column + len > ((mtd->size >> this->page_shift) -