dm persistent data: eliminate unnecessary return values

dm_bm_unlock and dm_tm_unlock return an integer value but the returned
value is always 0.  The calling code sometimes checks the return value
and sometimes doesn't.

Eliminate these unnecessary return values and also the checks for them.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 16 insertions, 16 deletions

diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c
index aacbe70c2c2e..306d2e4502c4 100644
--- a/drivers/md/persistent-data/dm-space-map-common.c
+++ b/drivers/md/persistent-data/dm-space-map-common.c
@@ -259,9 +259,7 @@ int sm_ll_extend(struct ll_disk *ll, dm_block_t extra_blocks)
 
 		idx.blocknr = cpu_to_le64(dm_block_location(b));
 
-		r = dm_tm_unlock(ll->tm, b);
-		if (r < 0)
-			return r;
+		dm_tm_unlock(ll->tm, b);
 
 		idx.nr_free = cpu_to_le32(ll->entries_per_block);
 		idx.none_free_before = 0;
@@ -293,7 +291,9 @@ int sm_ll_lookup_bitmap(struct ll_disk *ll, dm_block_t b, uint32_t *result)
 
 	*result = sm_lookup_bitmap(dm_bitmap_data(blk), b);
 
-	return dm_tm_unlock(ll->tm, blk);
+	dm_tm_unlock(ll->tm, blk);
+
+	return 0;
 }
 
 static int sm_ll_lookup_big_ref_count(struct ll_disk *ll, dm_block_t b,
@@ -373,9 +373,7 @@ int sm_ll_find_free_block(struct ll_disk *ll, dm_block_t begin,
 			return r;
 		}
 
-		r = dm_tm_unlock(ll->tm, blk);
-		if (r < 0)
-			return r;
+		dm_tm_unlock(ll->tm, blk);
 
 		*result = i * ll->entries_per_block + (dm_block_t) position;
 		return 0;
@@ -429,9 +427,7 @@ static int sm_ll_mutate(struct ll_disk *ll, dm_block_t b,
 	if (ref_count <= 2) {
 		sm_set_bitmap(bm_le, bit, ref_count);
 
-		r = dm_tm_unlock(ll->tm, nb);
-		if (r < 0)
-			return r;
+		dm_tm_unlock(ll->tm, nb);
 
 		if (old > 2) {
 			r = dm_btree_remove(&ll->ref_count_info,
@@ -445,9 +441,7 @@ static int sm_ll_mutate(struct ll_disk *ll, dm_block_t b,
 		__le32 le_rc = cpu_to_le32(ref_count);
 
 		sm_set_bitmap(bm_le, bit, 3);
-		r = dm_tm_unlock(ll->tm, nb);
-		if (r < 0)
-			return r;
+		dm_tm_unlock(ll->tm, nb);
 
 		__dm_bless_for_disk(&le_rc);
 		r = dm_btree_insert(&ll->ref_count_info, ll->ref_count_root,
@@ -556,7 +550,9 @@ static int metadata_ll_init_index(struct ll_disk *ll)
 	memcpy(dm_block_data(b), &ll->mi_le, sizeof(ll->mi_le));
 	ll->bitmap_root = dm_block_location(b);
 
-	return dm_tm_unlock(ll->tm, b);
+	dm_tm_unlock(ll->tm, b);
+
+	return 0;
 }
 
 static int metadata_ll_open(struct ll_disk *ll)
@@ -570,7 +566,9 @@ static int metadata_ll_open(struct ll_disk *ll)
 		return r;
 
 	memcpy(&ll->mi_le, dm_block_data(block), sizeof(ll->mi_le));
-	return dm_tm_unlock(ll->tm, block);
+	dm_tm_unlock(ll->tm, block);
+
+	return 0;
 }
 
 static dm_block_t metadata_ll_max_entries(struct ll_disk *ll)
@@ -590,7 +588,9 @@ static int metadata_ll_commit(struct ll_disk *ll)
 	memcpy(dm_block_data(b), &ll->mi_le, sizeof(ll->mi_le));
 	ll->bitmap_root = dm_block_location(b);
 
-	return dm_tm_unlock(ll->tm, b);
+	dm_tm_unlock(ll->tm, b);
+
+	return 0;
 }
 
 int sm_ll_new_metadata(struct ll_disk *ll, struct dm_transaction_manager *tm)