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authorLinus Torvalds <torvalds@linux-foundation.org>2009-08-09 14:58:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-08-09 14:58:34 -0700
commitf4b9a988685da6386d7f9a72df3098bcc3270526 (patch)
tree73432363e9f42b3d0d79d523c91058bb53555722
parent17d11ba14990d2bbaaec9c09a200b803679a968e (diff)
parent32bc4820287a1a03982979515949e8ea56eac641 (diff)
downloadconfigs-f4b9a988685da6386d7f9a72df3098bcc3270526.tar.gz
Merge branch 'for-linus' of git://git.infradead.org/ubi-2.6
* 'for-linus' of git://git.infradead.org/ubi-2.6: UBI: compatible fallback in absense of sequence numbers UBI: fix double free on error path
-rw-r--r--drivers/mtd/ubi/eba.c1
-rw-r--r--drivers/mtd/ubi/scan.c13
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 0f2034c3ed2..e4d9ef0c965 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -1254,6 +1254,7 @@ out_free:
if (!ubi->volumes[i])
continue;
kfree(ubi->volumes[i]->eba_tbl);
+ ubi->volumes[i]->eba_tbl = NULL;
}
return err;
}
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c
index a423131b617..b847745394b 100644
--- a/drivers/mtd/ubi/scan.c
+++ b/drivers/mtd/ubi/scan.c
@@ -781,11 +781,22 @@ static int process_eb(struct ubi_device *ubi, struct ubi_scan_info *si,
return -EINVAL;
}
+ /*
+ * Make sure that all PEBs have the same image sequence number.
+ * This allows us to detect situations when users flash UBI
+ * images incorrectly, so that the flash has the new UBI image
+ * and leftovers from the old one. This feature was added
+ * relatively recently, and the sequence number was always
+ * zero, because old UBI implementations always set it to zero.
+ * For this reasons, we do not panic if some PEBs have zero
+ * sequence number, while other PEBs have non-zero sequence
+ * number.
+ */
image_seq = be32_to_cpu(ech->image_seq);
if (!si->image_seq_set) {
ubi->image_seq = image_seq;
si->image_seq_set = 1;
- } else if (ubi->image_seq != image_seq) {
+ } else if (ubi->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_dbg_dump_ec_hdr(ech);