UBI: simplify image sequence test

The test:
if (!a && b)
  a = b;
can be symplified in:
if (!a)
  a = b;

And there's no need to test if ubi->image_seq is not null, because if it is,
it is set to image_seq.
So, we just test if image_seq is not null.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 03b32b05ab15..33bb1f2b63e4 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -900,10 +900,9 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
                  * number.
                  */
                 image_seq = be32_to_cpu(ech->image_seq);
-                if (!ubi->image_seq && image_seq)
+                if (!ubi->image_seq)
                         ubi->image_seq = image_seq;
-                if (ubi->image_seq && image_seq &&
-                    ubi->image_seq != image_seq) {
+                if (image_seq && ubi->image_seq != image_seq) {
                         ubi_err("bad image sequence number %d in PEB %d, expected %d",
                                 image_seq, pnum, ubi->image_seq);
                         ubi_dump_ec_hdr(ech);