VFS: fix dio write returning EIO when try_to_release_page fails
[linux-2.6.git] / mm / filemap.c
index 54e9686..876bc59 100644 (file)
@@ -2129,13 +2129,20 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
         * After a write we want buffered reads to be sure to go to disk to get
         * the new data.  We invalidate clean cached page from the region we're
         * about to write.  We do this *before* the write so that we can return
-        * -EIO without clobbering -EIOCBQUEUED from ->direct_IO().
+        * without clobbering -EIOCBQUEUED from ->direct_IO().
         */
        if (mapping->nrpages) {
                written = invalidate_inode_pages2_range(mapping,
                                        pos >> PAGE_CACHE_SHIFT, end);
-               if (written)
+               /*
+                * If a page can not be invalidated, return 0 to fall back
+                * to buffered write.
+                */
+               if (written) {
+                       if (written == -EBUSY)
+                               return 0;
                        goto out;
+               }
        }
 
        written = mapping->a_ops->direct_IO(WRITE, iocb, iov, pos, *nr_segs);