From 4d25350da904f3e4d8f0da1e41a4d9807bb3525b Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 7 Jun 2011 03:01:07 -0700 Subject: mtd: pxa3xx_nand: Fix blank page ECC mismatch commit 543e32d5ff165d0d68deedb0e3557478c7c36a4a 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 Acked-by: Lei Wen Cc: Haojian Zhuang Cc: David Woodhouse Signed-off-by: Artem Bityutskiy Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/nand/pxa3xx_nand.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/mtd') diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index faa0edd28256..30689cc2b3c7 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -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++; } -- cgit v1.2.3