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f2fs: fix to reset variable correctlly

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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>
This commit is contained in:
Fan Li 2015-12-15 17:02:41 +08:00 committed by Jaegeuk Kim
parent 6ad7609a18
commit a1c1e9b74f
1 changed files with 2 additions and 7 deletions
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9
fs/f2fs/file.c
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@ -1700,7 +1700,6 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
}
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 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
* 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 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
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 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
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 @@ do_map:
}
map.m_lblk = idx;
map.m_len = pg_end - idx;
if (idx < pg_end && cnt < blk_per_seg)
goto do_map;