diff options
| author | Dave Young <hidave.darkstar@gmail.com> | 2008-03-20 02:45:04 +0000 |
|---|---|---|
| committer | Chris Wright <chrisw@sous-sol.org> | 2008-03-24 11:48:02 -0700 |
| commit | 6eb36c282b77ba9f392e7bc332f7fda80c310db6 (patch) | |
| tree | ea28969523fdfaf32de9c561617a681581b55aee | |
| parent | 58392e3a38e2a7a3d4a8e70889be017346c94e90 (diff) | |
zisofs: fix readpage() outside i_size
commit: 08ca0db8aa2db4ddcf487d46d85dc8ffb22162cc
A read request outside i_size will be handled in do_generic_file_read(). So
we just return 0 to avoid getting -EIO as normal reading, let
do_generic_file_read do the rest.
At the same time we need unlock the page to avoid system stuck.
Fixes http://bugzilla.kernel.org/show_bug.cgi?id=10227
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Acked-by: Jan Kara <jack@suse.cz>
Report-by: Christian Perle <chris@linuxinfotag.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/isofs/compress.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c index 37dbd6404787..defb932eee9a 100644 --- a/fs/isofs/compress.c +++ b/fs/isofs/compress.c @@ -72,6 +72,17 @@ static int zisofs_readpage(struct file *file, struct page *page) offset = index & ~zisofs_block_page_mask; blockindex = offset >> zisofs_block_page_shift; maxpage = (inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + + /* + * If this page is wholly outside i_size we just return zero; + * do_generic_file_read() will handle this for us + */ + if (page->index >= maxpage) { + SetPageUptodate(page); + unlock_page(page); + return 0; + } + maxpage = min(zisofs_block_pages, maxpage-offset); for ( i = 0 ; i < maxpage ; i++, offset++ ) { |