mtd: bcm47xxpart: only register partitions if the trx header was filled

Sometimes the trx offsets are 0, in that case there is no partition and
we should not try to add one.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
[Brian: rewrapped]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/mtd/bcm47xxpart.c b/drivers/mtd/bcm47xxpart.c
index f2db4d7d6c36..cc13ea5ce4d5 100644
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -172,18 +172,26 @@ static int bcm47xxpart_parse(struct mtd_info *master,
                                 i++;
                         }
 
-                        bcm47xxpart_add_part(&parts[curr_part++], "linux",
-                                             offset + trx->offset[i], 0);
-                        i++;
+                        if (trx->offset[i]) {
+                                bcm47xxpart_add_part(&parts[curr_part++],
+                                                     "linux",
+                                                     offset + trx->offset[i],
+                                                     0);
+                                i++;
+                        }
 
                         /*
                          * Pure rootfs size is known and can be calculated as:
                          * trx->length - trx->offset[i]. We don't fill it as
                          * we want to have jffs2 (overlay) in the same mtd.
                          */
-                        bcm47xxpart_add_part(&parts[curr_part++], "rootfs",
-                                             offset + trx->offset[i], 0);
-                        i++;
+                        if (trx->offset[i]) {
+                                bcm47xxpart_add_part(&parts[curr_part++],
+                                                     "rootfs",
+                                                     offset + trx->offset[i],
+                                                     0);
+                                i++;
+                        }
 
                         last_trx_part = curr_part - 1;