staging: erofs: clean up erofs_map_blocks_iter

This patch cleans up erofs_map_blocks* function and structure family,
just simply the code, no logic change.

Reviewed-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 26 deletions

diff --git a/drivers/staging/erofs/data.c b/drivers/staging/erofs/data.c
index 329fa4fa3e9c..9c471f08ffd4 100644
--- a/drivers/staging/erofs/data.c
+++ b/drivers/staging/erofs/data.c
@@ -165,37 +165,16 @@ err_out:
 	return err;
 }
 
-int erofs_map_blocks_iter(struct inode *inode,
-			  struct erofs_map_blocks *map,
-			  struct page **mpage_ret, int flags)
-{
-	/* by default, reading raw data never use erofs_map_blocks_iter */
-	if (unlikely(!is_inode_layout_compression(inode))) {
-		if (*mpage_ret)
-			put_page(*mpage_ret);
-		*mpage_ret = NULL;
-
-		return erofs_map_blocks(inode, map, flags);
-	}
-
-#ifdef CONFIG_EROFS_FS_ZIP
-	return z_erofs_map_blocks_iter(inode, map, mpage_ret, flags);
-#else
-	/* data compression is not available */
-	return -ENOTSUPP;
-#endif
-}
-
 int erofs_map_blocks(struct inode *inode,
 		     struct erofs_map_blocks *map, int flags)
 {
 	if (unlikely(is_inode_layout_compression(inode))) {
-		struct page *mpage = NULL;
-		int err;
+		int err = z_erofs_map_blocks_iter(inode, map, flags);
 
-		err = erofs_map_blocks_iter(inode, map, &mpage, flags);
-		if (mpage)
-			put_page(mpage);
+		if (map->mpage) {
+			put_page(map->mpage);
+			map->mpage = NULL;
+		}
 		return err;
 	}
 	return erofs_map_blocks_flatmode(inode, map, flags);