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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-08-10 23:40:50 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2009-08-10 23:40:50 +0200 |
| commit | dcbf77cac640af0ab944d5cbb07934bf6708b4d9 (patch) | |
| tree | e2f4d1b3a1089ee10436cb19740a9cb99f2dc527 /drivers/mtd/ubi/scan.c | |
| parent | c00aafcd4977769e8728292302ddbbb8b1082fab (diff) | |
| parent | 85dfd81dc57e8183a277ddd7a56aa65c96f3f487 (diff) | |
| download | kernel-crypto-dcbf77cac640af0ab944d5cbb07934bf6708b4d9.tar.gz kernel-crypto-dcbf77cac640af0ab944d5cbb07934bf6708b4d9.tar.xz kernel-crypto-dcbf77cac640af0ab944d5cbb07934bf6708b4d9.zip | |
Merge branch 'master' into for-linus
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); |