dm cache policy smq: fix alloc_bitset check that always evaluates as false

static analysis by cppcheck has found a check on alloc_bitset that
always evaluates as false and hence never finds an allocation failure:

[drivers/md/dm-cache-policy-smq.c:1689]: (warning) Logical conjunction
  always evaluates to false: !EXPR && EXPR.

Fix this by removing the incorrect mq->cache_hit_bits check

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index b6f2265..48a4a82 100644 (file)
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -1686,7 +1686,7 @@ static struct dm_cache_policy *smq_create(dm_cblock_t cache_size,
 
        if (from_cblock(cache_size)) {
                mq->cache_hit_bits = alloc_bitset(from_cblock(cache_size));
-               if (!mq->cache_hit_bits && mq->cache_hit_bits) {
+               if (!mq->cache_hit_bits) {
                        DMERR("couldn't allocate cache hit bitset");
                        goto bad_cache_hit_bits;
                }