dell-wmi: Fix memory leak

The output of wmi_get_event_data shall be freed before return.
Signed-off-by: NMatthew Garrett <mjg@redhat.com>
Signed-off-by: NYong Wang <yong.y.wang@linux.intel.com>

drivers/platform/x86/dell-wmi.c

@@ -217,6 +217,7 @@ static void dell_wmi_notify(u32 value, void *context)
 		if (dell_new_hk_type && (buffer_entry[1] != 0x10)) {
 			printk(KERN_INFO "dell-wmi: Received unknown WMI event"
 					 " (0x%x)\n", buffer_entry[1]);
+			kfree(obj);
 			return;
 		}
 
@@ -234,7 +235,7 @@ static void dell_wmi_notify(u32 value, void *context)
 			    key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) {
 			/* Don't report brightness notifications that will also
 			 * come via ACPI */
-			return;
+			;
 		} else {
 			input_report_key(dell_wmi_input_dev, key->keycode, 1);
 			input_sync(dell_wmi_input_dev);