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-rw-r--r--drivers/acpi/scan.c40
-rw-r--r--drivers/platform/x86/intel/int3472/common.c2
-rw-r--r--include/acpi/acpi_bus.h4
3 files changed, 34 insertions, 12 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f6b9ea937de1..d0277427e7ee 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2235,9 +2235,22 @@ ok:
return 0;
}
-static int acpi_dev_get_first_consumer_dev_cb(struct acpi_dep_data *dep, void *data)
+static int acpi_dev_get_next_consumer_dev_cb(struct acpi_dep_data *dep, void *data)
{
- struct acpi_device *adev;
+ struct acpi_device **adev_p = data;
+ struct acpi_device *adev = *adev_p;
+
+ /*
+ * If we're passed a 'previous' consumer device then we need to skip
+ * any consumers until we meet the previous one, and then NULL @data
+ * so the next one can be returned.
+ */
+ if (adev) {
+ if (dep->consumer == adev->handle)
+ *adev_p = NULL;
+
+ return 0;
+ }
adev = acpi_get_acpi_dev(dep->consumer);
if (adev) {
@@ -2368,25 +2381,32 @@ bool acpi_dev_ready_for_enumeration(const struct acpi_device *device)
EXPORT_SYMBOL_GPL(acpi_dev_ready_for_enumeration);
/**
- * acpi_dev_get_first_consumer_dev - Return ACPI device dependent on @supplier
+ * acpi_dev_get_next_consumer_dev - Return the next adev dependent on @supplier
* @supplier: Pointer to the dependee device
+ * @start: Pointer to the current dependent device
*
- * Returns the first &struct acpi_device which declares itself dependent on
+ * Returns the next &struct acpi_device which declares itself dependent on
* @supplier via the _DEP buffer, parsed from the acpi_dep_list.
*
- * The caller is responsible for putting the reference to adev when it is no
- * longer needed.
+ * If the returned adev is not passed as @start to this function, the caller is
+ * responsible for putting the reference to adev when it is no longer needed.
*/
-struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier)
+struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
+ struct acpi_device *start)
{
- struct acpi_device *adev = NULL;
+ struct acpi_device *adev = start;
acpi_walk_dep_device_list(supplier->handle,
- acpi_dev_get_first_consumer_dev_cb, &adev);
+ acpi_dev_get_next_consumer_dev_cb, &adev);
+
+ acpi_dev_put(start);
+
+ if (adev == start)
+ return NULL;
return adev;
}
-EXPORT_SYMBOL_GPL(acpi_dev_get_first_consumer_dev);
+EXPORT_SYMBOL_GPL(acpi_dev_get_next_consumer_dev);
/**
* acpi_bus_scan - Add ACPI device node objects in a given namespace scope.
diff --git a/drivers/platform/x86/intel/int3472/common.c b/drivers/platform/x86/intel/int3472/common.c
index 77cf058e4168..9db2bb0bbba4 100644
--- a/drivers/platform/x86/intel/int3472/common.c
+++ b/drivers/platform/x86/intel/int3472/common.c
@@ -62,7 +62,7 @@ int skl_int3472_get_sensor_adev_and_name(struct device *dev,
struct acpi_device *sensor;
int ret = 0;
- sensor = acpi_dev_get_first_consumer_dev(adev);
+ sensor = acpi_dev_get_next_consumer_dev(adev, NULL);
if (!sensor) {
dev_err(dev, "INT3472 seems to have no dependents.\n");
return -ENODEV;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 42f76f2c2d49..c66d17c3298b 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -742,7 +742,9 @@ bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const ch
void acpi_dev_clear_dependencies(struct acpi_device *supplier);
bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
-struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier);
+struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
+ struct acpi_device *start);
+
struct acpi_device *
acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
struct acpi_device *