The patch titled Subject: block/partition/msdos: detect AIX formatted disks even without 55aa has been added to the -mm tree. Its filename is block-partition-msdos-detect-aix-formatted-disks-even-without-55aa.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Philippe De Muyter <phdm@xxxxxxxxx> Subject: block/partition/msdos: detect AIX formatted disks even without 55aa AIX formatted disks do not always have the MSDOS 55aa signature. This happens e.g. for unbootable AIX disks. Up to now, such disks were not recognized as AIX disks, because of the missing 55aa. Fix that by inverting the two tests. Let's first check for the AIX magic strings, and only if that fails check for the MSDOS magic word. Signed-off-by: Philippe De Muyter <phdm@xxxxxxxxx> Cc: Andreas Mohr <andi@xxxxxxxx> Cc: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> Cc: Jens Axboe <axboe@xxxxxxxxx> Cc: Olaf Hering <olh@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- block/partitions/msdos.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff -puN block/partitions/msdos.c~block-partition-msdos-detect-aix-formatted-disks-even-without-55aa block/partitions/msdos.c --- a/block/partitions/msdos.c~block-partition-msdos-detect-aix-formatted-disks-even-without-55aa +++ a/block/partitions/msdos.c @@ -455,14 +455,19 @@ int msdos_partition(struct parsed_partit data = read_part_sector(state, 0, §); if (!data) return -1; - if (!msdos_magic_present(data + 510)) { + + /* + * Note order! (some AIX disks, e.g. unbootable kind, + * have no MSDOS 55aa) + */ + if (aix_magic_present(state, data)) { put_dev_sector(sect); + strlcat(state->pp_buf, " [AIX]", PAGE_SIZE); return 0; } - if (aix_magic_present(state, data)) { + if (!msdos_magic_present(data + 510)) { put_dev_sector(sect); - strlcat(state->pp_buf, " [AIX]", PAGE_SIZE); return 0; } _ Patches currently in -mm which might be from phdm@xxxxxxxxx are linux-next.patch block-partition-msdos-detect-aix-formatted-disks-even-without-55aa.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html