[CIFS] Fix cifs update of page cache. Write at correct offset when out of memory and add_to_page_cache fails.

Thanks to Shaggy for pointing out the fix.

Signed-off-by: Steve French ([e-mail])
Signed-off-by: Shaggy ([e-mail])

fs/cifs/CHANGES

···
 recommended, unmount and rmmod cifs will kill them when they are
 no longer needed).  Fix readdir to ASCII servers (ie older servers
 which do not support Unicode) and also require asterik.
-
+Fix out of memory case in which data could be written one page
+off in the page cache.
 
 Version 1.33
 ------------

fs/cifs/file.c

···
 				      GFP_KERNEL)) {
 			page_cache_release(page);
 			cFYI(1, ("Add page cache failed"));
+			data += PAGE_CACHE_SIZE;
+			bytes_read -= PAGE_CACHE_SIZE;
 			continue;
 		}