md/raid5: fix raid5_set_bi_hw_segments
authorNamhyung Kim <namhyung@gmail.com>
Mon, 13 Jun 2011 05:48:22 +0000 (14:48 +0900)
committerNeilBrown <neilb@suse.de>
Tue, 14 Jun 2011 04:09:41 +0000 (14:09 +1000)
commit9b2dc8b665932a8e681a7ab3237f60475e75e161
tree2f9b4b6a1439de5eb15afe0ca8c71f3e2347befc
parentf699bf2328521cc3e20c412fcdb9ffe1255c360f
md/raid5: fix raid5_set_bi_hw_segments

The @bio->bi_phys_segments consists of active stripes count in the
lower 16 bits and processed stripes count in the upper 16 bits. So
logical-OR operator should be bitwise one.

This bug has been present since 2.6.27 and the fix is suitable for any
-stable kernel since then.  Fortunately the bad code is only used on
error paths and is relatively unlikely to be hit.

Cc: stable@kernel.org
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid5.c