commit 6eb36c282b77ba9f392e7bc332f7fda80c310db6
Author: Dave Young <[EMAIL PROTECTED]>
Date: Thu Mar 20 02:45:04 2008 +0000
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 <[EMAIL PROTECTED]>
Acked-by: Jan Kara <[EMAIL PROTECTED]>
Report-by: Christian Perle <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
Signed-off-by: Chris Wright <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 37dbd64..defb932 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++ ) {
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