diff options
| author | Len Brown <len.brown@intel.com> | 2009-07-28 02:42:38 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-07-28 02:42:38 +0400 |
| commit | 7cb7f45c7feef43c8f71f5cfedfc0b19be2142f7 (patch) | |
| tree | c35f1815fefc6460c204473a738785d6da1cb642 | |
| parent | 4be3bd7849165e7efa6b0b35a23d6a3598d97465 (diff) | |
| download | linux-7cb7f45c7feef43c8f71f5cfedfc0b19be2142f7.tar.xz | |
Revert "ACPICA: Remove obsolete acpi_os_validate_address interface"
This reverts commit f9ca058430333c9a24c5ca926aa445125f88df18.
which caused a regression:
http://bugzilla.kernel.org/show_bug.cgi?id=13620
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/acpica/acobject.h | 1 | ||||
| -rw-r--r-- | drivers/acpi/acpica/dsopcode.c | 24 | ||||
| -rw-r--r-- | drivers/acpi/acpica/exfldio.c | 6 | ||||
| -rw-r--r-- | include/acpi/acpiosxf.h | 4 |
4 files changed, 35 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h index 544dcf834922..eb6f038b03d9 100644 --- a/drivers/acpi/acpica/acobject.h +++ b/drivers/acpi/acpica/acobject.h @@ -97,6 +97,7 @@ #define AOPOBJ_OBJECT_INITIALIZED 0x08 #define AOPOBJ_SETUP_COMPLETE 0x10 #define AOPOBJ_SINGLE_DATUM 0x20 +#define AOPOBJ_INVALID 0x40 /* Used if host OS won't allow an op_region address */ /****************************************************************************** * diff --git a/drivers/acpi/acpica/dsopcode.c b/drivers/acpi/acpica/dsopcode.c index 584d766e6f12..b79978f7bc71 100644 --- a/drivers/acpi/acpica/dsopcode.c +++ b/drivers/acpi/acpica/dsopcode.c @@ -397,6 +397,30 @@ acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), extra_desc->extra.aml_length, extra_desc->extra.aml_start); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Validate the region address/length via the host OS */ + + status = acpi_os_validate_address(obj_desc->region.space_id, + obj_desc->region.address, + (acpi_size) obj_desc->region.length, + acpi_ut_get_node_name(node)); + + if (ACPI_FAILURE(status)) { + /* + * Invalid address/length. We will emit an error message and mark + * the region as invalid, so that it will cause an additional error if + * it is ever used. Then return AE_OK. + */ + ACPI_EXCEPTION((AE_INFO, status, + "During address validation of OpRegion [%4.4s]", + node->name.ascii)); + obj_desc->common.flags |= AOPOBJ_INVALID; + status = AE_OK; + } + return_ACPI_STATUS(status); } diff --git a/drivers/acpi/acpica/exfldio.c b/drivers/acpi/acpica/exfldio.c index d4075b821021..6687be167f5f 100644 --- a/drivers/acpi/acpica/exfldio.c +++ b/drivers/acpi/acpica/exfldio.c @@ -113,6 +113,12 @@ acpi_ex_setup_region(union acpi_operand_object *obj_desc, } } + /* Exit if Address/Length have been disallowed by the host OS */ + + if (rgn_desc->common.flags & AOPOBJ_INVALID) { + return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS); + } + /* * Exit now for SMBus address space, it has a non-linear address space * and the request cannot be directly validated diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h index 3e798593b17b..ab0b85cf21f3 100644 --- a/include/acpi/acpiosxf.h +++ b/include/acpi/acpiosxf.h @@ -242,6 +242,10 @@ acpi_os_derive_pci_id(acpi_handle rhandle, acpi_status acpi_os_validate_interface(char *interface); 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); + u64 acpi_os_get_timer(void); acpi_status acpi_os_signal(u32 function, void *info); |