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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2008-11-06 23:53:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2008-11-07 02:41:20 +0300
commit5e35dd4651002207948f10c576fc7d9bad448815 (patch)
treecf747b0dcbe5d86ed2d4f2bec4f581bc4b7e8335 /fs/fat/fatent.c
parentd3dfa8228f87ab9960ab8b4718013d68e3c25a43 (diff)
downloadlinux-5e35dd4651002207948f10c576fc7d9bad448815.tar.xz
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/fat/fatent.c')
-rw-r--r--fs/fat/fatent.c18
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;