f2fs: fix to reset variable correctlly
f2fs_map_blocks will set m_flags and m_len to 0, so we don't need to
reset m_flags ourselves, but have to reset m_len to correct value
before use it again.
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index c6d909e..1f5892f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1700,7 +1700,6 @@
}
map.m_lblk = pg_start;
- map.m_len = pg_end - pg_start;
/*
* lookup mapping info in dnode page cache, skip defragmenting if all
@@ -1708,14 +1707,13 @@
* in logical blocks.
*/
while (map.m_lblk < pg_end) {
- map.m_flags = 0;
+ map.m_len = pg_end - map.m_lblk;
err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
if (err)
goto out;
if (!(map.m_flags & F2FS_MAP_FLAGS)) {
map.m_lblk++;
- map.m_len--;
continue;
}
@@ -1726,7 +1724,6 @@
blk_end = map.m_pblk + map.m_len;
map.m_lblk += map.m_len;
- map.m_len = pg_end - map.m_lblk;
}
if (!fragmented)
@@ -1752,14 +1749,13 @@
int cnt = 0;
do_map:
- map.m_flags = 0;
+ map.m_len = pg_end - map.m_lblk;
err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
if (err)
goto clear_out;
if (!(map.m_flags & F2FS_MAP_FLAGS)) {
map.m_lblk++;
- map.m_len--;
continue;
}
@@ -1784,7 +1780,6 @@
}
map.m_lblk = idx;
- map.m_len = pg_end - idx;
if (idx < pg_end && cnt < blk_per_seg)
goto do_map;