From: Mike Dunn <mikedunn@newsguy.com>
Date: Tue, 11 Sep 2012 15:50:50 +0000 (-0700)
Subject: mtd: docg4: ecc.read_page() returns 0 on uncorrectable errors
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5bf3d66a933efb71fa6db08a5043a617b6eadb4a;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

mtd: docg4: ecc.read_page() returns 0 on uncorrectable errors

Currently the docg4's ecc.read_page() method returns -EBADMSG when
uncorrectable bitflips occur.  This is wrong; 0 should be returned in
this case.  An error code should only be returned by this method in the
case of a hardware error (probably -EIO).

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/docg4.c b/drivers/mtd/nand/docg4.c
index 793921e56f8e..799da5d1c857 100644
--- a/drivers/mtd/nand/docg4.c
+++ b/drivers/mtd/nand/docg4.c
@@ -776,6 +776,8 @@ static int read_page(struct mtd_info *mtd, struct nand_chip *nand,
 	}
 
 	writew(0, docptr + DOC_DATAEND);
+	if (bits_corrected == -EBADMSG)	  /* uncorrectable errors */
+		return 0;
 	return bits_corrected;
 }