V4L/DVB (13188): xc5000: return an error on tuning attempts if firmware not loaded

Xc5000 tuning attempts shouldn't return zero in the case where the firmware
did not load successfully.

Thanks to Michael Krufky for pointing out this issue.

Cc: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/common/tuners/xc5000.c

@@ -633,8 +633,12 @@ static int xc5000_set_params(struct dvb_frontend *fe,
 	struct xc5000_priv *priv = fe->tuner_priv;
 	int ret;
 
-	if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS)
-		xc_load_fw_and_init_tuner(fe);
+	if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS) {
+		if (xc_load_fw_and_init_tuner(fe) != XC_RESULT_SUCCESS) {
+			dprintk(1, "Unable to load firmware and init tuner\n");
+			return -EINVAL;
+		}
+	}
 
 	dprintk(1, "%s() frequency=%d (Hz)\n", __func__, params->frequency);
 
@@ -884,8 +888,12 @@ static int xc5000_set_analog_params(struct dvb_frontend *fe,
 	if (priv->i2c_props.adap == NULL)
 		return -EINVAL;
 
-	if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS)
-		xc_load_fw_and_init_tuner(fe);
+	if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS) {
+		if (xc_load_fw_and_init_tuner(fe) != XC_RESULT_SUCCESS) {
+			dprintk(1, "Unable to load firmware and init tuner\n");
+			return -EINVAL;
+		}
+	}
 
 	switch (params->mode) {
 	case V4L2_TUNER_RADIO: