@@ -578,6 +578,7 @@ static bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
{
struct acpi_handle_list dep_devices;
acpi_status status;
+ bool ret = false;
int i;
if (!acpi_has_method(adev->handle, "_DEP"))
@@ -591,11 +592,14 @@ static bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
}
for (i = 0; i < dep_devices.count; i++) {
- if (dep_devices.handles[i] == handle)
- return true;
+ if (dep_devices.handles[i] == handle) {
+ ret = true;
+ break;
+ }
}
- return false;
+ acpi_handle_list_free(&dep_devices);
+ return ret;
}
static void acpi_lpss_link_consumer(struct device *dev1,
@@ -2029,6 +2029,7 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
mutex_unlock(&acpi_dep_list_lock);
}
+ acpi_handle_list_free(&dep_devices);
return count;
}
@@ -190,7 +190,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
{
acpi_status status;
unsigned long long tmp;
- struct acpi_handle_list devices;
+ struct acpi_handle_list devices = { 0 };
bool valid = false;
int i;
@@ -294,7 +294,7 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
}
}
if ((flag & ACPI_TRIPS_DEVICES) && tz->trips.passive.valid) {
- memset(&devices, 0, sizeof(struct acpi_handle_list));
+
status = acpi_evaluate_reference(tz->device->handle, "_PSL",
NULL, &devices);
if (ACPI_FAILURE(status)) {
@@ -305,12 +305,12 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
tz->trips.passive.valid = true;
}
- if (memcmp(&tz->trips.passive.devices, &devices,
- sizeof(struct acpi_handle_list))) {
- memcpy(&tz->trips.passive.devices, &devices,
- sizeof(struct acpi_handle_list));
- ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
+ if (acpi_handle_list_equal(&tz->trips.passive.devices, &devices)) {
+ acpi_handle_list_free(&devices);
+ return 0;
}
+ ACPI_THERMAL_TRIPS_EXCEPTION(flag, tz, "device");
+ acpi_handle_list_replace(&tz->trips.passive.devices, &devices);
}
if ((flag & ACPI_TRIPS_PASSIVE) || (flag & ACPI_TRIPS_DEVICES)) {
if (valid != tz->trips.passive.valid)
@@ -959,6 +959,17 @@ static void acpi_thermal_check_fn(struct work_struct *work)
mutex_unlock(&tz->thermal_check_lock);
}
+static void acpi_thermal_free_thermal_zone(struct acpi_thermal *tz)
+{
+ int i;
+
+ acpi_handle_list_free(&tz->trips.passive.devices);
+ for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
+ acpi_handle_list_free(&tz->trips.active[i].devices);
+
+ kfree(tz);
+}
+
static int acpi_thermal_add(struct acpi_device *device)
{
struct acpi_thermal *tz;
@@ -996,7 +1007,7 @@ static int acpi_thermal_add(struct acpi_device *device)
goto end;
free_memory:
- kfree(tz);
+ acpi_thermal_free_thermal_zone(tz);
end:
return result;
}
@@ -1012,7 +1023,7 @@ static void acpi_thermal_remove(struct acpi_device *device)
tz = acpi_driver_data(device);
acpi_thermal_unregister_thermal_zone(tz);
- kfree(tz);
+ acpi_thermal_free_thermal_zone(tz);
}
#ifdef CONFIG_PM_SLEEP
@@ -370,7 +370,8 @@ acpi_evaluate_reference(acpi_handle handle,
goto end;
}
- if (package->package.count > ACPI_MAX_HANDLES) {
+ list->handles = kcalloc(package->package.count, sizeof(*list->handles), GFP_KERNEL);
+ if (!list->handles) {
kfree(package);
return AE_NO_MEMORY;
}
@@ -402,7 +403,8 @@ acpi_evaluate_reference(acpi_handle handle,
end:
if (ACPI_FAILURE(status)) {
list->count = 0;
- //kfree(list->handles);
+ kfree(list->handles);
+ list->handles = NULL;
}
kfree(buffer.pointer);
@@ -412,6 +414,61 @@ acpi_evaluate_reference(acpi_handle handle,
EXPORT_SYMBOL(acpi_evaluate_reference);
+/**
+ * acpi_handle_list_equal - Check if two ACPI handle lists are the same
+ * @list1: First list to compare.
+ * @list2: Second list to compare.
+ *
+ * Return true if the given ACPI handle lists are of the same size and
+ * contain the same ACPI handles in the same order. Otherwise, return false.
+ */
+bool acpi_handle_list_equal(struct acpi_handle_list *list1,
+ struct acpi_handle_list *list2)
+{
+ return list1->count == list2->count &&
+ !memcmp(list1->handles, list2->handles,
+ list1->count * sizeof(acpi_handle));
+}
+EXPORT_SYMBOL_GPL(acpi_handle_list_equal);
+
+/**
+ * acpi_handle_list_replace - Replace one ACPI handle list with another
+ * @dst: ACPI handle list to replace.
+ * @src: Source ACPI handle list.
+ *
+ * Free the handles table in @dst, move the handles table from @src to @dst,
+ * copy count from @src to @dst and clear @src.
+ */
+void acpi_handle_list_replace(struct acpi_handle_list *dst,
+ struct acpi_handle_list *src)
+{
+ if (dst->count)
+ kfree(dst->handles);
+
+ dst->count = src->count;
+ dst->handles = src->handles;
+
+ src->handles = NULL;
+ src->count = 0;
+}
+EXPORT_SYMBOL_GPL(acpi_handle_list_replace);
+
+/**
+ * acpi_handle_list_free - Free the handles table in an ACPI handle list
+ * @list: ACPI handle list to free.
+ *
+ * Free the handles table in @list and clear its count field.
+ */
+void acpi_handle_list_free(struct acpi_handle_list *list)
+{
+ if (!list->count)
+ return;
+
+ kfree(list->handles);
+ list->count = 0;
+}
+EXPORT_SYMBOL_GPL(acpi_handle_list_free);
+
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld)
{
@@ -741,6 +741,7 @@ static bool is_san_consumer(struct platform_device *pdev, acpi_handle handle)
struct acpi_handle_list dep_devices;
acpi_handle supplier = ACPI_HANDLE(&pdev->dev);
acpi_status status;
+ bool ret = false;
int i;
if (!acpi_has_method(handle, "_DEP"))
@@ -753,11 +754,14 @@ static bool is_san_consumer(struct platform_device *pdev, acpi_handle handle)
}
for (i = 0; i < dep_devices.count; i++) {
- if (dep_devices.handles[i] == supplier)
- return true;
+ if (dep_devices.handles[i] == supplier) {
+ ret = true;
+ break;
+ }
}
- return false;
+ acpi_handle_list_free(&dep_devices);
+ return ret;
}
static acpi_status san_consumer_setup(acpi_handle handle, u32 lvl,
@@ -12,11 +12,9 @@
#include <linux/device.h>
#include <linux/property.h>
-/* TBD: Make dynamic */
-#define ACPI_MAX_HANDLES 10
struct acpi_handle_list {
u32 count;
- acpi_handle handles[ACPI_MAX_HANDLES];
+ acpi_handle* handles;
};
/* acpi_utils.h */
@@ -32,6 +30,11 @@ acpi_evaluate_reference(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
+bool acpi_handle_list_equal(struct acpi_handle_list *list1,
+ struct acpi_handle_list *list2);
+void acpi_handle_list_replace(struct acpi_handle_list *dst,
+ struct acpi_handle_list *src);
+void acpi_handle_list_free(struct acpi_handle_list *list);
acpi_status
acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
struct acpi_buffer *status_buf);