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| author | OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> | 2008-11-06 12:53:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-06 15:41:20 -0800 |
| commit | 5e35dd4651002207948f10c576fc7d9bad448815 (patch) | |
| tree | cf747b0dcbe5d86ed2d4f2bec4f581bc4b7e8335 /fs | |
| parent | d3dfa8228f87ab9960ab8b4718013d68e3c25a43 (diff) | |
| download | linux-rpi3-5e35dd4651002207948f10c576fc7d9bad448815.tar.gz linux-rpi3-5e35dd4651002207948f10c576fc7d9bad448815.tar.bz2 linux-rpi3-5e35dd4651002207948f10c576fc7d9bad448815.zip | |
fat: Fix fat_ent_update_ptr() for FAT12
This fixes the missing update for bhs/nr_bhs in case the caller
accessed from block boundary to first block of boundary.
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fat/fatent.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c index 5b5f49061b7c..13513992da3c 100644 --- a/fs/fat/fatent.c +++ b/fs/fat/fatent.c @@ -317,10 +317,20 @@ static inline int fat_ent_update_ptr(struct super_block *sb, /* Is this fatent's blocks including this entry? */ if (!fatent->nr_bhs || bhs[0]->b_blocknr != blocknr) return 0; - /* Does this entry need the next block? */ - if (sbi->fat_bits == 12 && (offset + 1) >= sb->s_blocksize) { - if (fatent->nr_bhs != 2 || bhs[1]->b_blocknr != (blocknr + 1)) - return 0; + if (sbi->fat_bits == 12) { + if ((offset + 1) < sb->s_blocksize) { + /* This entry is on bhs[0]. */ + if (fatent->nr_bhs == 2) { + brelse(bhs[1]); + fatent->nr_bhs = 1; + } + } else { + /* This entry needs the next block. */ + if (fatent->nr_bhs != 2) + return 0; + if (bhs[1]->b_blocknr != (blocknr + 1)) + return 0; + } } ops->ent_set_ptr(fatent, offset); return 1; |