Fix to earlier "Simplify invalidate part (try #6)" patch
That patch caused problems with connectathon test 5.
Reviewed-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
                if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
                    inode->i_mapping->nrpages != 0) {
                        rc = filemap_fdatawait(inode->i_mapping);
-                       mapping_set_error(inode->i_mapping, rc);
-                       return rc;
+                       if (rc) {
+                               mapping_set_error(inode->i_mapping, rc);
+                               return rc;
+                       }
                }
                /*
                 * Some applications poll for the file length in this strange
 
        if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
            inode->i_mapping->nrpages != 0) {
                rc = filemap_fdatawait(inode->i_mapping);
-               mapping_set_error(inode->i_mapping, rc);
-               return rc;
+               if (rc) {
+                       mapping_set_error(inode->i_mapping, rc);
+                       return rc;
+               }
        }
 
        rc = cifs_revalidate_dentry_attr(dentry);