[PATCH] FAT: DIO-write fallback to normal buffered
OGAWA Hirofumi [Tue, 20 Feb 2007 21:57:55 +0000 (13:57 -0800)]
If the DIO write on FAT is expanding the size, it will be fail by -EINVAL,
because FAT can't handle it now.

This patch fallback it to the normal buffered-write and would return
success.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/fat/inode.c

index 7610735..9bfe607 100644 (file)
@@ -173,10 +173,12 @@ static ssize_t fat_direct_IO(int rw, struct kiocb *iocb,
                 *
                 * But we must fill the remaining area or hole by nul for
                 * updating ->mmu_private.
+                *
+                * Return 0, and fallback to normal buffered write.
                 */
                loff_t size = offset + iov_length(iov, nr_segs);
                if (MSDOS_I(inode)->mmu_private < size)
-                       return -EINVAL;
+                       return 0;
        }
 
        /*