V4L/DVB (13963): siano, fix memory leak

Stanse found a memory leak in smscore_gpio_configure. buffer is not
freed/assigned on all paths. Fix that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c
index ca758bc..4bfd345 100644
--- a/drivers/media/dvb/siano/smscoreapi.c
+++ b/drivers/media/dvb/siano/smscoreapi.c
@@ -1459,8 +1459,10 @@
 	if (!(coredev->device_flags & SMS_DEVICE_FAMILY2)) {
 		pMsg->xMsgHeader.msgType = MSG_SMS_GPIO_CONFIG_REQ;
 		if (GetGpioPinParams(PinNum, &TranslatedPinNum, &GroupNum,
-				&groupCfg) != 0)
-			return -EINVAL;
+				&groupCfg) != 0) {
+			rc = -EINVAL;
+			goto free;
+		}
 
 		pMsg->msgData[1] = TranslatedPinNum;
 		pMsg->msgData[2] = GroupNum;
@@ -1490,6 +1492,7 @@
 		else
 			sms_err("smscore_gpio_configure error");
 	}
+free:
 	kfree(buffer);
 
 	return rc;