[PATCH] FAT fixes (2.3)

Alexander Viro (viro@math.psu.edu)
Fri, 8 Oct 1999 04:54:22 -0400 (EDT)

The patch below fixes the braino in 2.3 FAT support. Now it
handles writing behing the EOF correctly. Patch affects only FAT (none of
the functions is used by anybody else). Please, apply it. It's against
2.3.19, but 2.3.20-pre2 doesn't touch files in question.
Cheers,
Al

diff -urN linux-2.3.19/fs/buffer.c linux-bird.fat/fs/buffer.c
--- linux-2.3.19/fs/buffer.c Sun Sep 12 13:29:57 1999
+++ linux-bird.fat/fs/buffer.c Fri Oct 8 03:59:06 1999
@@ -1512,8 +1512,8 @@
char * target_buf, *target_data;
unsigned long data_offset = offset;

- offset = page->offset-inode->i_size;
- if (offset < 0)
+ offset = inode->i_size - page->offset;
+ if (page->offset>inode->i_size)
offset = 0;
else if (offset >= data_offset)
offset = data_offset;
diff -urN linux-2.3.19/fs/fat/file.c linux-bird.fat/fs/fat/file.c
--- linux-2.3.19/fs/fat/file.c Sun Sep 12 11:56:11 1999
+++ linux-bird.fat/fs/fat/file.c Fri Oct 8 03:59:46 1999
@@ -118,7 +118,7 @@
unsigned long page_cache = 0;
long status;

- pgpos = inode->i_size & PAGE_CACHE_MASK;
+ pgpos = MSDOS_I(inode)->i_realsize & PAGE_CACHE_MASK;
while (pgpos < page->offset) {
hash = page_hash(inode, pgpos);
repeat_find: new_page = __find_lock_page(inode, pgpos, hash);

-
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