btrfs: remove pointless indentation in btrfs_read_sys_array()

Instead of checking if we've read a BTRFS_CHUNK_ITEM_KEY from disk and
then process it we could just bail out early if the read disk key wasn't
a BTRFS_CHUNK_ITEM_KEY.

This removes a level of indentation and makes the code nicer to read.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/volumes.c

@@ -6806,11 +6806,18 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
 		sb_array_offset += len;
 		cur_offset += len;
 
-		if (key.type == BTRFS_CHUNK_ITEM_KEY) {
+		if (key.type != BTRFS_CHUNK_ITEM_KEY) {
+			btrfs_err(fs_info,
+			    "unexpected item type %u in sys_array at offset %u",
+				  (u32)key.type, cur_offset);
+			ret = -EIO;
+			break;
+		}
+
 		chunk = (struct btrfs_chunk *)sb_array_offset;
 		/*
-			 * At least one btrfs_chunk with one stripe must be
-			 * present, exact stripe count check comes afterwards
+		 * At least one btrfs_chunk with one stripe must be present,
+		 * exact stripe count check comes afterwards
 		 */
 		len = btrfs_chunk_item_size(1);
 		if (cur_offset + len > array_size)
@@ -6841,13 +6848,7 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
 		ret = read_one_chunk(&key, sb, chunk);
 		if (ret)
 			break;
-		} else {
-			btrfs_err(fs_info,
-			    "unexpected item type %u in sys_array at offset %u",
-				  (u32)key.type, cur_offset);
-			ret = -EIO;
-			break;
-		}
+
 		array_ptr += len;
 		sb_array_offset += len;
 		cur_offset += len;