From 86ee8ba64daf5e09a71e4c216f81fae8d1c937f3 Mon Sep 17 00:00:00 2001 From: Philippe De Muyter Date: Wed, 27 Feb 2013 17:05:16 -0800 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 Cc: Andreas Mohr Cc: OGAWA Hirofumi Cc: Jens Axboe Cc: Olaf Hering Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- block/partitions/msdos.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'block/partitions') diff --git a/block/partitions/msdos.c b/block/partitions/msdos.c index 8752a5d2656..7681cd295ab 100644 --- a/block/partitions/msdos.c +++ b/block/partitions/msdos.c @@ -455,14 +455,19 @@ int msdos_partition(struct parsed_partitions *state) 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; } -- cgit v1.2.3-70-g09d2