[media] mb86a20s: Split status read logic from DVB callback

Split the logic that reads the status from the DVB callback. That
helps to properly return an error code, if status read fails.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb-frontends/mb86a20s.c

@@ -320,16 +320,14 @@ static int mb86a20s_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 static int mb86a20s_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;
-	u8 val;
+	int val;
 
 	dprintk("\n");
 	*status = 0;
 
-	if (fe->ops.i2c_gate_ctrl)
-		fe->ops.i2c_gate_ctrl(fe, 0);
 	val = mb86a20s_readreg(state, 0x0a) & 0xf;
-	if (fe->ops.i2c_gate_ctrl)
-		fe->ops.i2c_gate_ctrl(fe, 1);
+	if (val < 0)
+		return val;
 
 	if (val >= 2)
 		*status |= FE_HAS_SIGNAL;
@@ -635,6 +633,25 @@ static int mb86a20s_get_frontend(struct dvb_frontend *fe)
 
 }
 
+static int mb86a20s_read_status_gate(struct dvb_frontend *fe,
+				     fe_status_t *status)
+{
+	int ret;
+
+	dprintk("\n");
+	*status = 0;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	ret = mb86a20s_read_status(fe, status);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	return ret;
+}
+
 static int mb86a20s_tune(struct dvb_frontend *fe,
 			bool re_tune,
 			unsigned int mode_flags,
@@ -649,7 +666,7 @@ static int mb86a20s_tune(struct dvb_frontend *fe,
 		rc = mb86a20s_set_frontend(fe);
 
 	if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
-		mb86a20s_read_status(fe, status);
+		mb86a20s_read_status_gate(fe, status);
 
 	return rc;
 }
@@ -730,7 +747,7 @@ static struct dvb_frontend_ops mb86a20s_ops = {
 	.init = mb86a20s_initfe,
 	.set_frontend = mb86a20s_set_frontend,
 	.get_frontend = mb86a20s_get_frontend,
-	.read_status = mb86a20s_read_status,
+	.read_status = mb86a20s_read_status_gate,
 	.read_signal_strength = mb86a20s_read_signal_strength,
 	.tune = mb86a20s_tune,
 };