[patch 41/41] ACPICA: Allow multiple backslash prefix in namepaths
From: Greg KH
Date: Wed Feb 04 2009 - 14:07:11 EST
2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------
From: Lin Ming <ming.m.lin@xxxxxxxxx>
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 <ming.m.lin@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/