From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Tue, 20 Feb 2007 21:57:55 +0000 (-0800)
Subject: [PATCH] FAT: DIO-write fallback to normal buffered
X-Git-Tag: v2.6.21-rc1~37
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94412a96c4553255bda7a232a349059dd7543338;p=linux-2.6

[PATCH] FAT: DIO-write fallback to normal buffered

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>
---

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 7610735442..9bfe607c89 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -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;
 	}
 
 	/*