mtd: onenand: add missing check

Coverity has reported that inside the function "onenand_block_by_block_erase()"
in onenand_base.c, we should add a check to prevent the incrementing of
possible NULL value for "region"

Signed-off-by: Maxin B. John <john.maxin@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index d27f93b354e858236ca574d550f54e02e37026a9..289ee3b1b03075d07604da88ee03141824f8f694 100644 (file)
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -2453,7 +2453,7 @@ static int onenand_block_by_block_erase(struct mtd_info *mtd,
                len -= block_size;
                addr += block_size;
 
-               if (addr == region_end) {
+               if (region && addr == region_end) {
                        if (!len)
                                break;
                        region++;