[ACPI] ACPICA 20051117

Fixed a problem in the AML parser where the method thread
count could be decremented below zero if any errors
occurred during the method parse phase. This should
eliminate AE_AML_METHOD_LIMIT exceptions seen on some
machines. This also fixed a related regression with the
mechanism that detects and corrects methods that cannot
properly handle reentrancy (related to the deployment of
the new OwnerId mechanism.)

Eliminated the pre-parsing of control methods (to detect
errors) during table load. Related to the problem above,
this was causing unwind issues if any errors occurred
during the parse, and it seemed to be overkill. A table
load should not be aborted if there are problems with
any single control method, thus rendering this feature
rather pointless.

Fixed a problem with the new table-driven resource manager
where an internal buffer overflow could occur for small
resource templates.

Implemented a new external interface, acpi_get_vendor_resource()
This interface will find and return a vendor-defined
resource descriptor within a _CRS or _PRS
method via an ACPI 3.0 UUID match. (from Bjorn Helgaas)

Removed the length limit (200) on string objects as
per the upcoming ACPI 3.0A specification. This affects
the following areas of the interpreter: 1) any implicit
conversion of a Buffer to a String, 2) a String object
result of the ASL Concatentate operator, 3) the String
object result of the ASL ToString operator.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

3 files changed, 10 insertions, 6 deletions

diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
index a03939399fa9..cd33397d9231 100644
--- a/drivers/acpi/tables/tbconvrt.c
+++ b/drivers/acpi/tables/tbconvrt.c
@@ -554,7 +554,9 @@ acpi_status acpi_tb_convert_table_fadt(void)
 	ACPI_DEBUG_PRINT((ACPI_DB_TABLES,
 			  "Hex dump of common internal FADT, size %d (%X)\n",
 			  acpi_gbl_FADT->length, acpi_gbl_FADT->length));
-	ACPI_DUMP_BUFFER((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
+
+	ACPI_DUMP_BUFFER(ACPI_CAST_PTR(u8, acpi_gbl_FADT),
+			 acpi_gbl_FADT->length);
 
 	return_ACPI_STATUS(AE_OK);
 }
diff --git a/drivers/acpi/tables/tbgetall.c b/drivers/acpi/tables/tbgetall.c
index 8d72343537e7..33c9ed8a6f99 100644
--- a/drivers/acpi/tables/tbgetall.c
+++ b/drivers/acpi/tables/tbgetall.c
@@ -292,7 +292,9 @@ acpi_status acpi_tb_get_required_tables(void)
 			  "Hex dump of entire DSDT, size %d (0x%X), Integer width = %d\n",
 			  acpi_gbl_DSDT->length, acpi_gbl_DSDT->length,
 			  acpi_gbl_integer_bit_width));
-	ACPI_DUMP_BUFFER((u8 *) acpi_gbl_DSDT, acpi_gbl_DSDT->length);
+
+	ACPI_DUMP_BUFFER(ACPI_CAST_PTR(u8, acpi_gbl_DSDT),
+			 acpi_gbl_DSDT->length);
 
 	/* Always delete the RSDP mapping, we are done with it */
 
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
index e6dfe688b76b..9d0bf536d674 100644
--- a/drivers/acpi/tables/tbutils.c
+++ b/drivers/acpi/tables/tbutils.c
@@ -240,16 +240,16 @@ acpi_tb_verify_table_checksum(struct acpi_table_header * table_header)
 
 u8 acpi_tb_generate_checksum(void *buffer, u32 length)
 {
-	const u8 *limit;
-	const u8 *rover;
+	u8 *end_buffer;
+	u8 *rover;
 	u8 sum = 0;
 
 	if (buffer && length) {
 		/*  Buffer and Length are valid   */
 
-		limit = (u8 *) buffer + length;
+		end_buffer = ACPI_ADD_PTR(u8, buffer, length);
 
-		for (rover = buffer; rover < limit; rover++) {
+		for (rover = buffer; rover < end_buffer; rover++) {
 			sum = (u8) (sum + *rover);
 		}
 	}