media: usb/dvb-usb-v2/rtl28xxu.c: clean up code to fix smatch warning

Fixes this smatch warning:

drivers/media/usb/dvb-usb-v2/rtl28xxu.c:1040 rtl2832u_frontend_attach() warn: missing error code 'ret'

It is actually a bogus warning since in this particular case ret isn't
meant to be set. But by reworking the code a bit the code is actually
a lot more understandable and it fixes this warning.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 3952cc5..97ed17a 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -944,12 +944,6 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
        if (dev->slave_demod) {
                struct i2c_board_info info = {};
 
-               /*
-                * We continue on reduced mode, without DVB-T2/C, using master
-                * demod, when slave demod fails.
-                */
-               ret = 0;
-
                /* attach slave demodulator */
                if (dev->slave_demod == SLAVE_DEMOD_MN88472) {
                        struct mn88472_config mn88472_config = {};
@@ -964,14 +958,11 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                        info.platform_data = &mn88472_config;
                        request_module(info.type);
                        client = i2c_new_client_device(&d->i2c_adap, &info);
-                       if (!i2c_client_has_driver(client)) {
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
+                       if (!i2c_client_has_driver(client))
                                goto err_slave_demod_failed;
-                       }
 
                        if (!try_module_get(client->dev.driver->owner)) {
                                i2c_unregister_device(client);
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
                                goto err_slave_demod_failed;
                        }
 
@@ -986,14 +977,11 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                        info.platform_data = &mn88473_config;
                        request_module(info.type);
                        client = i2c_new_client_device(&d->i2c_adap, &info);
-                       if (!i2c_client_has_driver(client)) {
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
+                       if (!i2c_client_has_driver(client))
                                goto err_slave_demod_failed;
-                       }
 
                        if (!try_module_get(client->dev.driver->owner)) {
                                i2c_unregister_device(client);
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
                                goto err_slave_demod_failed;
                        }
 
@@ -1009,10 +997,8 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                        adap->fe[1] = dvb_attach(cxd2841er_attach_t_c,
                                                 &cxd2837er_config,
                                                 &d->i2c_adap);
-                       if (!adap->fe[1]) {
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
+                       if (!adap->fe[1])
                                goto err_slave_demod_failed;
-                       }
                        adap->fe[1]->id = 1;
                        dev->i2c_client_slave_demod = NULL;
                } else {
@@ -1029,14 +1015,11 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                        info.platform_data = &si2168_config;
                        request_module(info.type);
                        client = i2c_new_client_device(&d->i2c_adap, &info);
-                       if (!i2c_client_has_driver(client)) {
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
+                       if (!i2c_client_has_driver(client))
                                goto err_slave_demod_failed;
-                       }
 
                        if (!try_module_get(client->dev.driver->owner)) {
                                i2c_unregister_device(client);
-                               dev->slave_demod = SLAVE_DEMOD_NONE;
                                goto err_slave_demod_failed;
                        }
 
@@ -1047,10 +1030,18 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                }
        }
        return 0;
-err_slave_demod_failed:
+
 err:
        dev_dbg(&d->intf->dev, "failed=%d\n", ret);
        return ret;
+
+err_slave_demod_failed:
+       /*
+        * We continue on reduced mode, without DVB-T2/C, using master
+        * demod, when slave demod fails.
+        */
+       dev->slave_demod = SLAVE_DEMOD_NONE;
+       return 0;
 }
 
 static int rtl28xxu_frontend_attach(struct dvb_usb_adapter *adap)