2 files changed, 113 insertions, 14 deletions

diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c
index a474ca2334d5..954ac8ce958a 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 c26c61fb36c3..6742d7bc4777 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)