ocfs2: do not log twice error messages

'o2hb_map_slot_data' and 'o2hb_populate_slot_data' are called from only
one place, in 'o2hb_region_dev_write'.  Return value is checked and
'mlog_errno' is called to log a message if it is not 0.

So there is no need to call 'mlog_errno' directly within these functions.
This would result on logging the message twice.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/cluster/heartbeat.c

@@ -1619,17 +1619,13 @@ static int o2hb_map_slot_data(struct o2hb_region *reg)
 	struct o2hb_disk_slot *slot;
 
 	reg->hr_tmp_block = kmalloc(reg->hr_block_bytes, GFP_KERNEL);
-	if (reg->hr_tmp_block == NULL) {
-		mlog_errno(-ENOMEM);
+	if (reg->hr_tmp_block == NULL)
 		return -ENOMEM;
-	}
 
 	reg->hr_slots = kcalloc(reg->hr_blocks,
 				sizeof(struct o2hb_disk_slot), GFP_KERNEL);
-	if (reg->hr_slots == NULL) {
-		mlog_errno(-ENOMEM);
+	if (reg->hr_slots == NULL)
 		return -ENOMEM;
-	}
 
 	for(i = 0; i < reg->hr_blocks; i++) {
 		slot = &reg->hr_slots[i];
@@ -1645,17 +1641,13 @@ static int o2hb_map_slot_data(struct o2hb_region *reg)
 
 	reg->hr_slot_data = kcalloc(reg->hr_num_pages, sizeof(struct page *),
 				    GFP_KERNEL);
-	if (!reg->hr_slot_data) {
-		mlog_errno(-ENOMEM);
+	if (!reg->hr_slot_data)
 		return -ENOMEM;
-	}
 
 	for(i = 0; i < reg->hr_num_pages; i++) {
 		page = alloc_page(GFP_KERNEL);
-		if (!page) {
-			mlog_errno(-ENOMEM);
+		if (!page)
 			return -ENOMEM;
-		}
 
 		reg->hr_slot_data[i] = page;
 
@@ -1687,10 +1679,8 @@ static int o2hb_populate_slot_data(struct o2hb_region *reg)
 	struct o2hb_disk_heartbeat_block *hb_block;
 
 	ret = o2hb_read_slots(reg, reg->hr_blocks);
-	if (ret) {
-		mlog_errno(ret);
+	if (ret)
 		goto out;
-	}
 
 	/* We only want to get an idea of the values initially in each
 	 * slot, so we do no verification - o2hb_check_slot will