From 89a63572b5e327609000e80869989f461c85021e Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 7 Jun 2011 03:01:07 -0700 Subject: [PATCH] mtd: pxa3xx_nand: Fix blank page ECC mismatch This bug was introduced in 2763637e ("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 Cc: stable@kernel.org [2.6.38+] Signed-off-by: Artem Bityutskiy --- drivers/mtd/nand/pxa3xx_nand.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 9fde1399af916..5c3af2f72a62c 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++; } -- 2.39.5