From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764026AbZBDTHJ (ORCPT ); Wed, 4 Feb 2009 14:07:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759614AbZBDStu (ORCPT ); Wed, 4 Feb 2009 13:49:50 -0500 Received: from kroah.org ([198.145.64.141]:33044 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1759514AbZBDStl (ORCPT ); Wed, 4 Feb 2009 13:49:41 -0500 Date: Wed, 4 Feb 2009 10:47:10 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , Willy Tarreau , Rodrigo Rubira Branco , Jake Edge , Eugene Teo , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Lin Ming , Bob Moore , Len Brown , Thomas Renninger Subject: [patch 41/41] ACPICA: Allow multiple backslash prefix in namepaths Message-ID: <20090204184710.GP25246@kroah.com> References: <20090204184029.881610776@mini.kroah.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline; filename="acpica-allow-multiple-backslash-prefix-in-namepaths.patch" In-Reply-To: <20090204184539.GA25246@kroah.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Lin Ming commit d037c5fd7367548191eab2b376a1d08c4ffaf7ff upstream. In a fully qualified namepath, allow multiple backslash prefixes. This can happen because of the use of a double-backslash in strings (since backslash is the escape character) causing confusion. ACPICA BZ 739 Lin Ming. http://www.acpica.org/bugzilla/show_bug.cgi?id=739 Signed-off-by: Lin Ming Signed-off-by: Bob Moore Signed-off-by: Len Brown Cc: Thomas Renninger Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/namespace/nsutils.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/drivers/acpi/namespace/nsutils.c +++ b/drivers/acpi/namespace/nsutils.c @@ -314,9 +314,15 @@ void acpi_ns_get_internal_name_length(st * * strlen() + 1 covers the first name_seg, which has no path separator */ - if (acpi_ns_valid_root_prefix(next_external_char[0])) { + if (acpi_ns_valid_root_prefix(*next_external_char)) { info->fully_qualified = TRUE; next_external_char++; + + /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */ + + while (acpi_ns_valid_root_prefix(*next_external_char)) { + next_external_char++; + } } else { /* * Handle Carat prefixes