From a5fe1a03f7720b8da8364a1737e1e5a357904e99 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Thu, 13 Aug 2009 10:43:27 +0800 Subject: ACPICA: fix leak of acpi_os_validate_address http://bugzilla.kernel.org/show_bug.cgi?id=13620 If the dynamic region is created and added to resource list over and over again, it has the potential to be a memory leak by growing the list every time. This patch fixes the memory leak, as below 1) add a new field "count" to struct acpi_res_list. When inserting, if the region(addr, len) is already in the resource list, we just increase "count", otherwise, the region is inserted with count=1. When deleting, the "count" is decreased, if it's decreased to 0, the region is deleted from the resource list. With "count", the region with same address and length can only be inserted to the resource list once, so prevent potential memory leak. 2) add a new function acpi_os_invalidate_address, which is called when region is deleted. Signed-off-by: Lin Ming Signed-off-by: Len Brown --- include/acpi/acpiosxf.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h index ab0b85cf21f..eb0e7189075 100644 --- a/include/acpi/acpiosxf.h +++ b/include/acpi/acpiosxf.h @@ -245,6 +245,9 @@ acpi_status acpi_osi_invalidate(char* interface); acpi_status acpi_os_validate_address(u8 space_id, acpi_physical_address address, acpi_size length, char *name); +acpi_status +acpi_os_invalidate_address(u8 space_id, acpi_physical_address address, + acpi_size length); u64 acpi_os_get_timer(void); -- cgit v1.2.3