device property: Constify device_get_match_data()

Constify device_get_match_data() as OF and ACPI variants return
constant value.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index e6285b5ce0d5..0dad0bd9327b 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -830,7 +830,7 @@ const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 }
 EXPORT_SYMBOL_GPL(acpi_match_device);
 
-void *acpi_device_get_match_data(const struct device *dev)
+const void *acpi_device_get_match_data(const struct device *dev)
 {
 	const struct acpi_device_id *match;
 
@@ -838,7 +838,7 @@ void *acpi_device_get_match_data(const struct device *dev)
 	if (!match)
 		return NULL;
 
-	return (void *)match->driver_data;
+	return (const void *)match->driver_data;
 }
 EXPORT_SYMBOL_GPL(acpi_device_get_match_data);