[PATCH 2/3] UBI: fix check_data_ff return code

[Artem Bityutskiy <dedekind1@gmail.com>]

From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

When the data does not contain all 0xFF bytes, 'check_data_ff()' should return
1, not -EINVAL; Also, the caller ('process_eb()') should not add the PEB to the
"corrupted" list if there was a read error.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
---
 drivers/mtd/ubi/scan.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index 2fbb571..e7b800b 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -784,7 +784,7 @@ static int check_data_ff(struct ubi_device *ubi, struct ubi_vid_hdr *vid_hdr,
 	ubi_dbg_print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
 			       ubi->peb_buf1, ubi->leb_size, 1);
 	mutex_unlock(&ubi->buf_mutex);
-	return -EINVAL;
+	return 1;
 }
 
 /**
@@ -936,7 +936,10 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si,
 			 * have to check what is in the data area.
 			 */
 			err = check_data_ff(ubi, vidh, pnum);
-		if (!err)
+
+		if (err < 0)
+			return err;
+		else if (!err)
 			/* This corruption is caused by a power cut */
 			err = add_to_list(si, pnum, ec, 1, &si->erase);
 		else
-- 
1.7.2.3