block: atari: Return early for unsupported sector size

[mirror_ubuntu-artful-kernel.git] / block / partitions / atari.c

diff --git a/block/partitions/atari.c b/block/partitions/atari.c
index 9875b05e80a2cfb8bbdd859db09308cf70286814..ff1fb93712c1a84eb2fa605678d39feca7acc09e 100644 (file)
--- a/block/partitions/atari.c
+++ b/block/partitions/atari.c
@@ -42,6 +42,13 @@ int atari_partition(struct parsed_partitions *state)
        int part_fmt = 0; /* 0:unknown, 1:AHDI, 2:ICD/Supra */
 #endif
 
+       /*
+        * ATARI partition scheme supports 512 lba only.  If this is not
+        * the case, bail early to avoid miscalculating hd_size.
+        */
+       if (bdev_logical_block_size(state->bdev) != 512)
+               return 0;
+
        rs = read_part_sector(state, 0, &sect);
        if (!rs)
                return -1;