Merge branch 'linus' into perfcounters/core

Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up
              the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 99 insertions, 56 deletions

diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index baa5fc0..db307a3 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -211,6 +211,12 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 
 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
 
+static unsigned int gts, bfs;
+module_param(gts, uint, 0644);
+module_param(bfs, uint, 0644);
+MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
+MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_enter_sleep_state
@@ -278,16 +284,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 		return_ACPI_STATUS(status);
 	}
 
-	/* Execute the _GTS method */
+	if (gts) {
+		/* Execute the _GTS method */
 
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = sleep_state;
+		arg_list.count = 1;
+		arg_list.pointer = &arg;
+		arg.type = ACPI_TYPE_INTEGER;
+		arg.integer.value = sleep_state;
 
-	status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
-	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-		return_ACPI_STATUS(status);
+		status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
+		if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+			return_ACPI_STATUS(status);
+		}
 	}
 
 	/* Get current value of PM1A control */
@@ -513,18 +521,19 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
 		}
 	}
 
-	/* Execute the _BFS method */
+	if (bfs) {
+		/* Execute the _BFS method */
 
-	arg_list.count = 1;
-	arg_list.pointer = &arg;
-	arg.type = ACPI_TYPE_INTEGER;
-	arg.integer.value = sleep_state;
+		arg_list.count = 1;
+		arg_list.pointer = &arg;
+		arg.type = ACPI_TYPE_INTEGER;
+		arg.integer.value = sleep_state;
 
-	status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
-	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
-		ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+		status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
+		if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+			ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+		}
 	}
-
 	return_ACPI_STATUS(status);
 }
 
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index bd3c937..ec33f27 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -152,7 +152,7 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 		ACPI_ERROR((AE_INFO,
 			    "Illegal I/O port address/length above 64K: 0x%p/%X",
 			    ACPI_CAST_PTR(void, address), byte_width));
-		return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
+		return_ACPI_STATUS(AE_LIMIT);
 	}
 
 	/* Exit if requested address is not within the protected port table */
@@ -179,11 +179,12 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 			/* Port illegality may depend on the _OSI calls made by the BIOS */
 
 			if (acpi_gbl_osi_data >= port_info->osi_dependency) {
-				ACPI_ERROR((AE_INFO,
-					    "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
-					    ACPI_CAST_PTR(void, address),
-					    byte_width, port_info->name,
-					    port_info->start, port_info->end));
+				ACPI_DEBUG_PRINT((ACPI_DB_IO,
+						  "Denied AML access to port 0x%p/%X (%s 0x%.4X-0x%.4X)",
+						  ACPI_CAST_PTR(void, address),
+						  byte_width, port_info->name,
+						  port_info->start,
+						  port_info->end));
 
 				return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
 			}
@@ -207,7 +208,7 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
  *              Value               Where value is placed
  *              Width               Number of bits
  *
- * RETURN:      Value read from port
+ * RETURN:      Status and value read from port
  *
  * DESCRIPTION: Read data from an I/O port or register. This is a front-end
  *              to acpi_os_read_port that performs validation on both the port
@@ -218,14 +219,43 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
 {
 	acpi_status status;
+	u32 one_byte;
+	u32 i;
+
+	/* Validate the entire request and perform the I/O */
 
 	status = acpi_hw_validate_io_request(address, width);
-	if (ACPI_FAILURE(status)) {
+	if (ACPI_SUCCESS(status)) {
+		status = acpi_os_read_port(address, value, width);
 		return status;
 	}
 
-	status = acpi_os_read_port(address, value, width);
-	return status;
+	if (status != AE_AML_ILLEGAL_ADDRESS) {
+		return status;
+	}
+
+	/*
+	 * There has been a protection violation within the request. Fall
+	 * back to byte granularity port I/O and ignore the failing bytes.
+	 * This provides Windows compatibility.
+	 */
+	for (i = 0, *value = 0; i < width; i += 8) {
+
+		/* Validate and read one byte */
+
+		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
+			status = acpi_os_read_port(address, &one_byte, 8);
+			if (ACPI_FAILURE(status)) {
+				return status;
+			}
+
+			*value |= (one_byte << i);
+		}
+
+		address++;
+	}
+
+	return AE_OK;
 }
 
 /******************************************************************************
@@ -236,7 +266,7 @@ acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
  *              Value               Value to write
  *              Width               Number of bits
  *
- * RETURN:      None
+ * RETURN:      Status
  *
  * DESCRIPTION: Write data to an I/O port or register. This is a front-end
  *              to acpi_os_write_port that performs validation on both the port
@@ -247,12 +277,39 @@ acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
 acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
 {
 	acpi_status status;
+	u32 i;
+
+	/* Validate the entire request and perform the I/O */
 
 	status = acpi_hw_validate_io_request(address, width);
-	if (ACPI_FAILURE(status)) {
+	if (ACPI_SUCCESS(status)) {
+		status = acpi_os_write_port(address, value, width);
 		return status;
 	}
 
-	status = acpi_os_write_port(address, value, width);
-	return status;
+	if (status != AE_AML_ILLEGAL_ADDRESS) {
+		return status;
+	}
+
+	/*
+	 * There has been a protection violation within the request. Fall
+	 * back to byte granularity port I/O and ignore the failing bytes.
+	 * This provides Windows compatibility.
+	 */
+	for (i = 0; i < width; i += 8) {
+
+		/* Validate and write one byte */
+
+		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
+			status =
+			    acpi_os_write_port(address, (value >> i) & 0xFF, 8);
+			if (ACPI_FAILURE(status)) {
+				return status;
+			}
+		}
+
+		address++;
+	}
+
+	return AE_OK;
 }
diff --git a/drivers/acpi/acpica/rscreate.c b/drivers/acpi/acpica/rscreate.c
index 663f692..a3c23d6 100644
--- a/drivers/acpi/acpica/rscreate.c
+++ b/drivers/acpi/acpica/rscreate.c
@@ -191,8 +191,6 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 	user_prt = ACPI_CAST_PTR(struct acpi_pci_routing_table, buffer);
 
 	for (index = 0; index < number_of_elements; index++) {
-		int source_name_index = 2;
-		int source_index_index = 3;
 
 		/*
 		 * Point user_prt past this current structure
@@ -261,27 +259,6 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 			return_ACPI_STATUS(AE_BAD_DATA);
 		}
 
-		/*
-		 * If BIOS erroneously reversed the _PRT source_name and source_index,
-		 * then reverse them back.
-		 */
-		if ((sub_object_list[3])->common.type !=
-		    ACPI_TYPE_INTEGER) {
-			if (acpi_gbl_enable_interpreter_slack) {
-				source_name_index = 3;
-				source_index_index = 2;
-				printk(KERN_WARNING
-				       "ACPI: Handling Garbled _PRT entry\n");
-			} else {
-				ACPI_ERROR((AE_INFO,
-					    "(PRT[%X].source_index) Need Integer, found %s",
-					    index,
-					    acpi_ut_get_object_type_name
-					    (sub_object_list[3])));
-				return_ACPI_STATUS(AE_BAD_DATA);
-			}
-		}
-
 		user_prt->pin = (u32) obj_desc->integer.value;
 
 		/*
@@ -304,7 +281,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 		 * 3) Third subobject: Dereference the PRT.source_name
 		 * The name may be unresolved (slack mode), so allow a null object
 		 */
-		obj_desc = sub_object_list[source_name_index];
+		obj_desc = sub_object_list[2];
 		if (obj_desc) {
 			switch (obj_desc->common.type) {
 			case ACPI_TYPE_LOCAL_REFERENCE:
@@ -378,7 +355,7 @@ acpi_rs_create_pci_routing_table(union acpi_operand_object *package_object,
 
 		/* 4) Fourth subobject: Dereference the PRT.source_index */
 
-		obj_desc = sub_object_list[source_index_index];
+		obj_desc = sub_object_list[3];
 		if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
 			ACPI_ERROR((AE_INFO,
 				    "(PRT[%X].SourceIndex) Need Integer, found %s",