diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-27 22:00:20 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-27 22:00:20 -0700 |
| commit | 4b61bb575b1fb42ab1df228ae7812e5135f656da (patch) | |
| tree | 03456466e6f678456ea462a7da4b352d1aa03aa3 /drivers/mtd/ubi/scan.c | |
| parent | 805423e84e900e56c834aadee61a020b0d5092c3 (diff) | |
| parent | 326ba5010a5429a5a528b268b36a5900d4ab0eba (diff) | |
Merge commit 'v2.6.31-rc8' into next
Diffstat (limited to 'drivers/mtd/ubi/scan.c')
| -rw-r--r-- | drivers/mtd/ubi/scan.c | 13 |
1 files changed, 12 insertions, 1 deletions
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); |