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mtd: pxa3xx_nand: Fix blank page ECC mismatch

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commit 543e32d5ff upstream.

This bug was introduced in f8155a40 ("mtd: pxa3xx_nand: rework irq
logic") and causes the PXA3xx NAND controller fail to operate with NAND
flash that has empty pages. According to the comment in this block, the
hardware controller will report a double-bit error for empty pages,
which can and must be ignored.

This patch restores the original behaviour of the driver.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Lei Wen <leiwen@marvell.com>
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Daniel Mack
2011-06-07 03:01:07 -07:00
committed by Greg Kroah-Hartman
parent 33e73819e7
commit 4d25350da9
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/nand/pxa3xx_nand.c
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@@ -685,6 +685,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
* OOB, ignore such double bit errors
*/
if (is_buf_blank(buf, mtd->writesize))
info->retcode = ERR_NONE;
else
mtd->ecc_stats.failed++;
}