[PATCH] msdos partitions: fix logic error in AIX detection

Correct the AIX magic check to let 'echo > /dev/sdb' actually work.

Signed-off-by: Olaf Hering <olh@suse.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index dafd3b6b2dc3..78443e07b3c4 100644
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -68,10 +68,10 @@ static int aix_magic_present(unsigned char *p, struct block_device *bdev)
         unsigned char *d;
         int slot, ret = 0;
 
-        if (p[0] != AIX_LABEL_MAGIC1 &&
-                p[1] != AIX_LABEL_MAGIC2 &&
-                p[2] != AIX_LABEL_MAGIC3 &&
-                p[3] != AIX_LABEL_MAGIC4)
+        if (!(p[0] == AIX_LABEL_MAGIC1 &&
+                p[1] == AIX_LABEL_MAGIC2 &&
+                p[2] == AIX_LABEL_MAGIC3 &&
+                p[3] == AIX_LABEL_MAGIC4))
                 return 0;
         /* Assume the partition table is valid if Linux partitions exists */
         for (slot = 1; slot <= 4; slot++, pt++) {