erofs: get rid of label `restart_now'

Simplify this part of code. No logic changes.

Link: https://lore.kernel.org/r/20220529055425.226363-3-xiang@kernel.org
Acked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
index 4fd66a66c5f917ce0c721c11c10797a7b7f1c2ac..6dd858f94e44636ef2e4c21c90e466a91a9f7075 100644 (file)
--- a/fs/erofs/zdata.c
+++ b/fs/erofs/zdata.c
@@ -643,28 +643,23 @@ static int z_erofs_do_read_page(struct z_erofs_decompress_frontend *fe,
 repeat:
        cur = end - 1;
 
-       /* lucky, within the range of the current map_blocks */
-       if (offset + cur >= map->m_la &&
-           offset + cur < map->m_la + map->m_llen) {
+       if (offset + cur < map->m_la ||
+           offset + cur >= map->m_la + map->m_llen) {
+               erofs_dbg("out-of-range map @ pos %llu", offset + cur);
+
+               if (z_erofs_collector_end(fe))
+                       fe->backmost = false;
+               map->m_la = offset + cur;
+               map->m_llen = 0;
+               err = z_erofs_map_blocks_iter(inode, map, 0);
+               if (err)
+                       goto err_out;
+       } else {
+               if (fe->pcl)
+                       goto hitted;
                /* didn't get a valid pcluster previously (very rare) */
-               if (!fe->pcl)
-                       goto restart_now;
-               goto hitted;
        }
 
-       /* go ahead the next map_blocks */
-       erofs_dbg("%s: [out-of-range] pos %llu", __func__, offset + cur);
-
-       if (z_erofs_collector_end(fe))
-               fe->backmost = false;
-
-       map->m_la = offset + cur;
-       map->m_llen = 0;
-       err = z_erofs_map_blocks_iter(inode, map, 0);
-       if (err)
-               goto err_out;
-
-restart_now:
        if (!(map->m_flags & EROFS_MAP_MAPPED))
                goto hitted;