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media: ddbridge: improve error handling logic on fe attach failures

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This change makes sure that demod frontends are always detached whenever
a tuner frontend attach failed. Achieve this by moving the detach-on-
failure logic at the end of dvb_input_attach(), and adding a goto to this
block on every tuner attach failure case, so if an error occurs, there are
no stray attached frontends left. As a side effect, this removes some
duplicated code.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Daniel Scheller 2017-12-06 12:59:14 -05:00 committed by Mauro Carvalho Chehab
parent 6738d3bbab
commit b32a2b42f7
1 changed files with 22 additions and 27 deletions
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49
drivers/media/pci/ddbridge/ddbridge-core.c
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@ -1449,48 +1449,43 @@ static int dvb_input_attach(struct ddb_input *input)
if (demod_attach_stv0900(input, 0) < 0)
return -ENODEV;
if (tuner_attach_stv6110(input, 0) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBS_ST_AA:
if (demod_attach_stv0900(input, 1) < 0)
return -ENODEV;
if (tuner_attach_stv6110(input, 1) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBS_STV0910:
if (demod_attach_stv0910(input, 0) < 0)
return -ENODEV;
if (tuner_attach_stv6111(input, 0) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBS_STV0910_PR:
if (demod_attach_stv0910(input, 1) < 0)
return -ENODEV;
if (tuner_attach_stv6111(input, 1) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBS_STV0910_P:
if (demod_attach_stv0910(input, 0) < 0)
return -ENODEV;
if (tuner_attach_stv6111(input, 1) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBCT_TR:
if (demod_attach_drxk(input) < 0)
return -ENODEV;
if (tuner_attach_tda18271(input) < 0)
return -ENODEV;
goto err_tuner;
break;
case DDB_TUNER_DVBCT_ST:
if (demod_attach_stv0367(input) < 0)
return -ENODEV;
if (tuner_attach_tda18212(input, port->type) < 0) {
if (dvb->fe2)
dvb_frontend_detach(dvb->fe2);
if (dvb->fe)
dvb_frontend_detach(dvb->fe);
return -ENODEV;
}
if (tuner_attach_tda18212(input, port->type) < 0)
goto err_tuner;
break;
case DDB_TUNER_DVBC2T2I_SONY_P:
if (input->port->dev->link[input->port->lnr].info->ts_quirks &
@ -1509,13 +1504,8 @@ static int dvb_input_attach(struct ddb_input *input)
par = 1;
if (demod_attach_cxd28xx(input, par, osc24) < 0)
return -ENODEV;
if (tuner_attach_tda18212(input, port->type) < 0) {
if (dvb->fe2)
dvb_frontend_detach(dvb->fe2);
if (dvb->fe)
dvb_frontend_detach(dvb->fe);
return -ENODEV;
}
if (tuner_attach_tda18212(input, port->type) < 0)
goto err_tuner;
break;
case DDB_TUNER_DVBC2T2I_SONY:
osc24 = 1;
@ -1525,13 +1515,8 @@ static int dvb_input_attach(struct ddb_input *input)
case DDB_TUNER_ISDBT_SONY:
if (demod_attach_cxd28xx(input, 0, osc24) < 0)
return -ENODEV;
if (tuner_attach_tda18212(input, port->type) < 0) {
if (dvb->fe2)
dvb_frontend_detach(dvb->fe2);
if (dvb->fe)
dvb_frontend_detach(dvb->fe);
return -ENODEV;
}
if (tuner_attach_tda18212(input, port->type) < 0)
goto err_tuner;
break;
default:
return 0;
@ -1554,6 +1539,16 @@ static int dvb_input_attach(struct ddb_input *input)
dvb->attached = 0x31;
return 0;
err_tuner:
dev_warn(port->dev->dev, "tuner attach failed!\n");
if (dvb->fe2)
dvb_frontend_detach(dvb->fe2);
if (dvb->fe)
dvb_frontend_detach(dvb->fe);
return -ENODEV;
}
static int port_has_encti(struct ddb_port *port)