From: Richard Weinberger <richard@nod.at>
Date: Mon, 9 Mar 2015 09:04:09 +0000 (+0100)
Subject: UBI: Fastmap: Fall back to scanning mode after ECC error
X-Git-Tag: firefly_0821_release~176^2~1968^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=180a53577b809026af744e99a35b3a3a0056520b;p=firefly-linux-kernel-4.4.55.git

UBI: Fastmap: Fall back to scanning mode after ECC error

If we encounter an uncorrectable ECC error while scanning for the fastmap
UBI must not fail hard. Instead fall back to scanning mode.

Reported-by: Alexander Block <Alexander.Block@continental-corporation.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 42d465add385..68eea5befaf1 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -1419,7 +1419,7 @@ int ubi_attach(struct ubi_device *ubi, int force_scan)
 		err = scan_all(ubi, ai, 0);
 	else {
 		err = scan_fast(ubi, &ai);
-		if (err > 0) {
+		if (err > 0 || mtd_is_eccerr(err)) {
 			if (err != UBI_NO_FASTMAP) {
 				destroy_ai(ai);
 				ai = alloc_ai();