[MTD][MTDPART] Fix a division by zero bug

When detecting a partition beyond the end of the device, skip most of
the initialisation, in particular those bits causing a division by zero.

Signed-off-by: Jörn Engel <joern@logfs.org>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 5aac59c21ead..edb90b58a9b1 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -411,11 +411,12 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
 
         /* let's do some sanity checks */
         if (slave->offset >= master->size) {
-                        /* let's register it anyway to preserve ordering */
+                /* let's register it anyway to preserve ordering */
                 slave->offset = 0;
                 slave->mtd.size = 0;
                 printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
                         part->name);
+                goto out_register;
         }
         if (slave->offset + slave->mtd.size > master->size) {
                 slave->mtd.size = master->size - slave->offset;
@@ -475,6 +476,7 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
                 }
         }
 
+out_register:
         if (part->mtdp) {
                 /* store the object pointer (caller may or may not register it*/
                 *part->mtdp = &slave->mtd;