diff options
Diffstat (limited to 'drivers/mtd/ubi/io.c')
| -rw-r--r-- | drivers/mtd/ubi/io.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index c8edbfd09b6..b5871401109 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -563,15 +563,16 @@ int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum) * This function returns zero if the erase counter header is OK, and %1 if * not. */ -static int validate_ec_hdr(const struct ubi_device *ubi, +static int validate_ec_hdr(struct ubi_device *ubi, const struct ubi_ec_hdr *ec_hdr) { long long ec; - int vid_hdr_offset, leb_start; + int vid_hdr_offset, leb_start, image_seq; ec = be64_to_cpu(ec_hdr->ec); vid_hdr_offset = be32_to_cpu(ec_hdr->vid_hdr_offset); leb_start = be32_to_cpu(ec_hdr->data_offset); + image_seq = be32_to_cpu(ec_hdr->image_seq); if (ec_hdr->version != UBI_VERSION) { ubi_err("node with incompatible UBI version found: " @@ -597,6 +598,15 @@ static int validate_ec_hdr(const struct ubi_device *ubi, goto bad; } + if (!ubi->image_seq_set) { + ubi->image_seq = image_seq; + ubi->image_seq_set = 1; + } else if (ubi->image_seq != image_seq) { + ubi_err("bad image sequence number %d, expected %d", + image_seq, ubi->image_seq); + goto bad; + } + return 0; bad: @@ -742,6 +752,7 @@ int ubi_io_write_ec_hdr(struct ubi_device *ubi, int pnum, ec_hdr->version = UBI_VERSION; ec_hdr->vid_hdr_offset = cpu_to_be32(ubi->vid_hdr_offset); ec_hdr->data_offset = cpu_to_be32(ubi->leb_start); + ec_hdr->image_seq = cpu_to_be32(ubi->image_seq); crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC); ec_hdr->hdr_crc = cpu_to_be32(crc); |