From: Boris BREZILLON <boris.brezillon@free-electrons.com>
Date: Wed, 30 Sep 2015 21:45:29 +0000 (+0200)
Subject: mtd: nand: sunxi: fix bitflips in erased pages
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=146b503e102778ee98d8ba59e9e178ab26a4af5b;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

mtd: nand: sunxi: fix bitflips in erased pages

Use the nand_check_erased_ecc_chunk() function to test if the ECC error
was triggered by an erased page containing a few bitflips.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---

diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index a76eb5173bb8..92245a312334 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -611,7 +611,9 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
 	sunxi_nfc_read_buf(mtd, oob, ecc->bytes + 4);
 
 	if (status & NFC_ECC_ERR(0)) {
-		ret = -EIO;
+		ret = nand_check_erased_ecc_chunk(data,	ecc->size,
+						  oob, ecc->bytes + 4,
+						  NULL, 0, ecc->strength);
 	} else {
 		/*
 		 * The engine protects 4 bytes of OOB data per chunk.