Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPICA: fix acpi-cpufreq boot crash due to _PSD return-by-reference
  ACPI: Delete the IRQ operation in throttling controll via PTC

2 files changed, 113 insertions, 14 deletions

diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c
index a474ca2334d..954ac8ce958 100644
--- a/drivers/acpi/dispatcher/dsobject.c
+++ b/drivers/acpi/dispatcher/dsobject.c
@@ -137,6 +137,71 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
 				return_ACPI_STATUS(status);
 			}
 		}
+
+		/* Special object resolution for elements of a package */
+
+		if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
+		    (op->common.parent->common.aml_opcode ==
+		     AML_VAR_PACKAGE_OP)) {
+			/*
+			 * Attempt to resolve the node to a value before we insert it into
+			 * the package. If this is a reference to a common data type,
+			 * resolve it immediately. According to the ACPI spec, package
+			 * elements can only be "data objects" or method references.
+			 * Attempt to resolve to an Integer, Buffer, String or Package.
+			 * If cannot, return the named reference (for things like Devices,
+			 * Methods, etc.) Buffer Fields and Fields will resolve to simple
+			 * objects (int/buf/str/pkg).
+			 *
+			 * NOTE: References to things like Devices, Methods, Mutexes, etc.
+			 * will remain as named references. This behavior is not described
+			 * in the ACPI spec, but it appears to be an oversight.
+			 */
+			obj_desc = (union acpi_operand_object *)op->common.node;
+
+			status =
+			    acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
+							  (struct
+							   acpi_namespace_node,
+							   &obj_desc),
+							  walk_state);
+			if (ACPI_FAILURE(status)) {
+				return_ACPI_STATUS(status);
+			}
+
+			switch (op->common.node->type) {
+				/*
+				 * For these types, we need the actual node, not the subobject.
+				 * However, the subobject got an extra reference count above.
+				 */
+			case ACPI_TYPE_MUTEX:
+			case ACPI_TYPE_METHOD:
+			case ACPI_TYPE_POWER:
+			case ACPI_TYPE_PROCESSOR:
+			case ACPI_TYPE_EVENT:
+			case ACPI_TYPE_REGION:
+			case ACPI_TYPE_DEVICE:
+			case ACPI_TYPE_THERMAL:
+
+				obj_desc =
+				    (union acpi_operand_object *)op->common.
+				    node;
+				break;
+
+			default:
+				break;
+			}
+
+			/*
+			 * If above resolved to an operand object, we are done. Otherwise,
+			 * we have a NS node, we must create the package entry as a named
+			 * reference.
+			 */
+			if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) !=
+			    ACPI_DESC_TYPE_NAMED) {
+				goto exit;
+			}
+		}
 	}
 
 	/* Create and init a new internal ACPI object */
@@ -156,6 +221,7 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
 		return_ACPI_STATUS(status);
 	}
 
+      exit:
 	*obj_desc_ptr = obj_desc;
 	return_ACPI_STATUS(AE_OK);
 }
@@ -356,12 +422,25 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
 	arg = arg->common.next;
 	for (i = 0; arg && (i < element_count); i++) {
 		if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
-
-			/* This package element is already built, just get it */
-
-			obj_desc->package.elements[i] =
-			    ACPI_CAST_PTR(union acpi_operand_object,
-					  arg->common.node);
+			if (arg->common.node->type == ACPI_TYPE_METHOD) {
+				/*
+				 * A method reference "looks" to the parser to be a method
+				 * invocation, so we special case it here
+				 */
+				arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
+				status =
+				    acpi_ds_build_internal_object(walk_state,
+								  arg,
+								  &obj_desc->
+								  package.
+								  elements[i]);
+			} else {
+				/* This package element is already built, just get it */
+
+				obj_desc->package.elements[i] =
+				    ACPI_CAST_PTR(union acpi_operand_object,
+						  arg->common.node);
+			}
 		} else {
 			status = acpi_ds_build_internal_object(walk_state, arg,
 							       &obj_desc->
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index c26c61fb36c..6742d7bc477 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -29,6 +29,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/sched.h>
 #include <linux/cpufreq.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
@@ -413,7 +414,7 @@ static int acpi_throttling_rdmsr(struct acpi_processor *pr,
 	} else {
 		msr_low = 0;
 		msr_high = 0;
-		rdmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL,
+		rdmsr_safe(MSR_IA32_THERM_CONTROL,
 			(u32 *)&msr_low , (u32 *) &msr_high);
 		msr = (msr_high << 32) | msr_low;
 		*value = (acpi_integer) msr;
@@ -438,7 +439,7 @@ static int acpi_throttling_wrmsr(struct acpi_processor *pr, acpi_integer value)
 			"HARDWARE addr space,NOT supported yet\n");
 	} else {
 		msr = value;
-		wrmsr_on_cpu(cpu, MSR_IA32_THERM_CONTROL,
+		wrmsr_safe(MSR_IA32_THERM_CONTROL,
 			msr & 0xffffffff, msr >> 32);
 		ret = 0;
 	}
@@ -572,21 +573,32 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
 		return -ENODEV;
 
 	pr->throttling.state = 0;
-	local_irq_disable();
+
 	value = 0;
 	ret = acpi_read_throttling_status(pr, &value);
 	if (ret >= 0) {
 		state = acpi_get_throttling_state(pr, value);
 		pr->throttling.state = state;
 	}
-	local_irq_enable();
 
 	return 0;
 }
 
 static int acpi_processor_get_throttling(struct acpi_processor *pr)
 {
-	return pr->throttling.acpi_processor_get_throttling(pr);
+	cpumask_t saved_mask;
+	int ret;
+
+	/*
+	 * Migrate task to the cpu pointed by pr.
+	 */
+	saved_mask = current->cpus_allowed;
+	set_cpus_allowed(current, cpumask_of_cpu(pr->id));
+	ret = pr->throttling.acpi_processor_get_throttling(pr);
+	/* restore the previous state */
+	set_cpus_allowed(current, saved_mask);
+
+	return ret;
 }
 
 static int acpi_processor_get_fadt_info(struct acpi_processor *pr)
@@ -717,21 +729,29 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
 	if (state < pr->throttling_platform_limit)
 		return -EPERM;
 
-	local_irq_disable();
 	value = 0;
 	ret = acpi_get_throttling_value(pr, state, &value);
 	if (ret >= 0) {
 		acpi_write_throttling_state(pr, value);
 		pr->throttling.state = state;
 	}
-	local_irq_enable();
 
 	return 0;
 }
 
 int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
 {
-	return pr->throttling.acpi_processor_set_throttling(pr, state);
+	cpumask_t saved_mask;
+	int ret;
+	/*
+	 * Migrate task to the cpu pointed by pr.
+	 */
+	saved_mask = current->cpus_allowed;
+	set_cpus_allowed(current, cpumask_of_cpu(pr->id));
+	ret = pr->throttling.acpi_processor_set_throttling(pr, state);
+	/* restore the previous state */
+	set_cpus_allowed(current, saved_mask);
+	return ret;
 }
 
 int acpi_processor_get_throttling_info(struct acpi_processor *pr)