tree 449f6598e10a1930d113fd7bbe3aa6ca37341d10
parent 1f08ad02379530e1c970d3d104343b9907b4d1b4
author Daniel McNeil <daniel@osdl.org> 1113690350 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1113690350 -0700

[PATCH] Direct IO async short read fix

The direct I/O code is mapping the read request to the file system block.  If
the file size was not on a block boundary, the result would show the the read
reading past EOF.  This was only happening for the AIO case.  The non-AIO case
truncates the result to match file size (in direct_io_worker).  This patch
does the same thing for the AIO case, it truncates the result to match the
file size if the read reads past EOF.

When I/O completes the result can be truncated to match the file size
without using i_size_read(), thus the aio result now matches the number of
bytes read to the end of file.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>