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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 18:50:12 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 18:50:12 +0000
commit8665bd53f2f2e27e5511d90428cb3f60e6d0ce15 (patch)
tree8d58900dc0ebd4a3011f92c128d2fe45bc7c4bf2 /drivers/acpi/utils.c
parentAdding debian version 6.7.12-1. (diff)
downloadlinux-8665bd53f2f2e27e5511d90428cb3f60e6d0ce15.tar.xz
linux-8665bd53f2f2e27e5511d90428cb3f60e6d0ce15.zip
Merging upstream version 6.8.9.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/acpi/utils.c')
-rw-r--r--drivers/acpi/utils.c164
1 files changed, 66 insertions, 98 deletions
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 62944e35fc..abac5cc254 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -329,21 +329,18 @@ const char *acpi_get_subsystem_id(acpi_handle handle)
}
EXPORT_SYMBOL_GPL(acpi_get_subsystem_id);
-acpi_status
-acpi_evaluate_reference(acpi_handle handle,
- acpi_string pathname,
- struct acpi_object_list *arguments,
- struct acpi_handle_list *list)
+bool acpi_evaluate_reference(acpi_handle handle, acpi_string pathname,
+ struct acpi_object_list *arguments,
+ struct acpi_handle_list *list)
{
- acpi_status status = AE_OK;
- union acpi_object *package = NULL;
- union acpi_object *element = NULL;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- u32 i = 0;
-
+ union acpi_object *package;
+ acpi_status status;
+ bool ret = false;
+ u32 i;
if (!list)
- return AE_BAD_PARAMETER;
+ return false;
/* Evaluate object. */
@@ -353,62 +350,47 @@ acpi_evaluate_reference(acpi_handle handle,
package = buffer.pointer;
- if ((buffer.length == 0) || !package) {
- status = AE_BAD_DATA;
- acpi_util_eval_error(handle, pathname, status);
- goto end;
- }
- if (package->type != ACPI_TYPE_PACKAGE) {
- status = AE_BAD_DATA;
- acpi_util_eval_error(handle, pathname, status);
- goto end;
- }
- if (!package->package.count) {
- status = AE_BAD_DATA;
- acpi_util_eval_error(handle, pathname, status);
- goto end;
- }
+ if (buffer.length == 0 || !package ||
+ package->type != ACPI_TYPE_PACKAGE || !package->package.count)
+ goto err;
- list->handles = kcalloc(package->package.count, sizeof(*list->handles), GFP_KERNEL);
- if (!list->handles) {
- kfree(package);
- return AE_NO_MEMORY;
- }
list->count = package->package.count;
+ list->handles = kcalloc(list->count, sizeof(*list->handles), GFP_KERNEL);
+ if (!list->handles)
+ goto err_clear;
/* Extract package data. */
for (i = 0; i < list->count; i++) {
+ union acpi_object *element = &(package->package.elements[i]);
- element = &(package->package.elements[i]);
+ if (element->type != ACPI_TYPE_LOCAL_REFERENCE ||
+ !element->reference.handle)
+ goto err_free;
- if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
- status = AE_BAD_DATA;
- acpi_util_eval_error(handle, pathname, status);
- break;
- }
-
- if (!element->reference.handle) {
- status = AE_NULL_ENTRY;
- acpi_util_eval_error(handle, pathname, status);
- break;
- }
/* Get the acpi_handle. */
list->handles[i] = element->reference.handle;
acpi_handle_debug(list->handles[i], "Found in reference list\n");
}
- if (ACPI_FAILURE(status)) {
- list->count = 0;
- kfree(list->handles);
- list->handles = NULL;
- }
+ ret = true;
end:
kfree(buffer.pointer);
- return status;
+ return ret;
+
+err_free:
+ kfree(list->handles);
+ list->handles = NULL;
+
+err_clear:
+ list->count = 0;
+
+err:
+ acpi_util_eval_error(handle, pathname, status);
+ goto end;
}
EXPORT_SYMBOL(acpi_evaluate_reference);
@@ -426,7 +408,7 @@ bool acpi_handle_list_equal(struct acpi_handle_list *list1,
{
return list1->count == list2->count &&
!memcmp(list1->handles, list2->handles,
- list1->count * sizeof(acpi_handle));
+ list1->count * sizeof(*list1->handles));
}
EXPORT_SYMBOL_GPL(acpi_handle_list_equal);
@@ -468,6 +450,40 @@ void acpi_handle_list_free(struct acpi_handle_list *list)
}
EXPORT_SYMBOL_GPL(acpi_handle_list_free);
+/**
+ * acpi_device_dep - Check ACPI device dependency
+ * @target: ACPI handle of the target ACPI device.
+ * @match: ACPI handle to look up in the target's _DEP list.
+ *
+ * Return true if @match is present in the list returned by _DEP for
+ * @target or false otherwise.
+ */
+bool acpi_device_dep(acpi_handle target, acpi_handle match)
+{
+ struct acpi_handle_list dep_devices;
+ bool ret = false;
+ int i;
+
+ if (!acpi_has_method(target, "_DEP"))
+ return false;
+
+ if (!acpi_evaluate_reference(target, "_DEP", NULL, &dep_devices)) {
+ acpi_handle_debug(target, "Failed to evaluate _DEP.\n");
+ return false;
+ }
+
+ for (i = 0; i < dep_devices.count; i++) {
+ if (dep_devices.handles[i] == match) {
+ ret = true;
+ break;
+ }
+ }
+
+ acpi_handle_list_free(&dep_devices);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(acpi_device_dep);
+
acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld)
{
@@ -825,54 +841,6 @@ bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs)
EXPORT_SYMBOL(acpi_check_dsm);
/**
- * acpi_dev_uid_match - Match device by supplied UID
- * @adev: ACPI device to match.
- * @uid2: Unique ID of the device.
- *
- * Matches UID in @adev with given @uid2.
- *
- * Returns:
- * - %true if matches.
- * - %false otherwise.
- */
-bool acpi_dev_uid_match(struct acpi_device *adev, const char *uid2)
-{
- const char *uid1 = acpi_device_uid(adev);
-
- return uid1 && uid2 && !strcmp(uid1, uid2);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_uid_match);
-
-/**
- * acpi_dev_hid_uid_match - Match device by supplied HID and UID
- * @adev: ACPI device to match.
- * @hid2: Hardware ID of the device.
- * @uid2: Unique ID of the device, pass NULL to not check _UID.
- *
- * Matches HID and UID in @adev with given @hid2 and @uid2. Absence of @uid2
- * will be treated as a match. If user wants to validate @uid2, it should be
- * done before calling this function.
- *
- * Returns:
- * - %true if matches or @uid2 is NULL.
- * - %false otherwise.
- */
-bool acpi_dev_hid_uid_match(struct acpi_device *adev,
- const char *hid2, const char *uid2)
-{
- const char *hid1 = acpi_device_hid(adev);
-
- if (strcmp(hid1, hid2))
- return false;
-
- if (!uid2)
- return true;
-
- return acpi_dev_uid_match(adev, uid2);
-}
-EXPORT_SYMBOL(acpi_dev_hid_uid_match);
-
-/**
* acpi_dev_uid_to_integer - treat ACPI device _UID as integer
* @adev: ACPI device to get _UID from
* @integer: output buffer for integer