Commit 543e32d5 authored by Daniel Mack's avatar Daniel Mack Committed by Artem Bityutskiy
Browse files

mtd: pxa3xx_nand: Fix blank page ECC mismatch 



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: default avatarDaniel Mack <zonque@gmail.com>
Acked-by: default avatarLei Wen <leiwen@marvell.com>
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
parent 0fab028b

drivers/mtd/nand/pxa3xx_nand.c

+2 −0
Original line number Diff line number Diff line
@@ -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++;

	}