[media] dvb: move dvb_set_frontend logic into a separate routine

This change is there in order to prepare the code to avoid calling
 dvb_frontend_ioctl_legacy() from FE_SET_PROPERTY.

A call to dvb_frontend_ioctl_legacy() would require to update the
DVBv3 cache without need, mangling calls for newer delivery system
without any reason.

No functional changes here.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 33ce309..eefcb7f 100644 (file)
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -1786,6 +1786,97 @@ out:
        return err;
 }
 
+static int dtv_set_frontend(struct file *file, unsigned int cmd, void *parg)
+{
+       struct dvb_device *dvbdev = file->private_data;
+       struct dvb_frontend *fe = dvbdev->priv;
+       struct dvb_frontend_private *fepriv = fe->frontend_priv;
+       struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+       struct dvb_frontend_tune_settings fetunesettings;
+
+       if (c->state == DTV_TUNE) {
+               if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0)
+                       return -EINVAL;
+       } else {
+               if (dvb_frontend_check_parameters(fe, parg) < 0)
+                       return -EINVAL;
+
+               memcpy (&fepriv->parameters_in, parg,
+                       sizeof (struct dvb_frontend_parameters));
+               dtv_property_cache_init(fe, c);
+               dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
+       }
+
+       /*
+               * Initialize output parameters to match the values given by
+               * the user. FE_SET_FRONTEND triggers an initial frontend event
+               * with status = 0, which copies output parameters to userspace.
+               */
+       fepriv->parameters_out = fepriv->parameters_in;
+
+       memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
+
+       /* force auto frequency inversion if requested */
+       if (dvb_force_auto_inversion) {
+               c->inversion = INVERSION_AUTO;
+       }
+       if (fe->ops.info.type == FE_OFDM) {
+               /* without hierarchical coding code_rate_LP is irrelevant,
+                       * so we tolerate the otherwise invalid FEC_NONE setting */
+               if (c->hierarchy == HIERARCHY_NONE &&
+                       c->code_rate_LP == FEC_NONE)
+                       c->code_rate_LP = FEC_AUTO;
+       }
+
+       /* get frontend-specific tuning settings */
+       if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
+               fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
+               fepriv->max_drift = fetunesettings.max_drift;
+               fepriv->step_size = fetunesettings.step_size;
+       } else {
+               /* default values */
+               switch(fe->ops.info.type) {
+               case FE_QPSK:
+                       fepriv->min_delay = HZ/20;
+                       fepriv->step_size = c->symbol_rate / 16000;
+                       fepriv->max_drift = c->symbol_rate / 2000;
+                       break;
+
+               case FE_QAM:
+                       fepriv->min_delay = HZ/20;
+                       fepriv->step_size = 0; /* no zigzag */
+                       fepriv->max_drift = 0;
+                       break;
+
+               case FE_OFDM:
+                       fepriv->min_delay = HZ/20;
+                       fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
+                       fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
+                       break;
+               case FE_ATSC:
+                       fepriv->min_delay = HZ/20;
+                       fepriv->step_size = 0;
+                       fepriv->max_drift = 0;
+                       break;
+               }
+       }
+       if (dvb_override_tune_delay > 0)
+               fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
+
+       fepriv->state = FESTATE_RETUNE;
+
+       /* Request the search algorithm to search */
+       fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
+
+       dvb_frontend_clear_events(fe);
+       dvb_frontend_add_event(fe, 0);
+       dvb_frontend_wakeup(fe);
+       fepriv->status = 0;
+
+       return 0;
+}
+
+
 static int dvb_frontend_ioctl_legacy(struct file *file,
                        unsigned int cmd, void *parg)
 {
@@ -1969,96 +2060,9 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
                        err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
                break;
 
-       case FE_SET_FRONTEND: {
-               struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-               struct dvb_frontend_tune_settings fetunesettings;
-
-               if (c->state == DTV_TUNE) {
-                       if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) {
-                               err = -EINVAL;
-                               break;
-                       }
-               } else {
-                       if (dvb_frontend_check_parameters(fe, parg) < 0) {
-                               err = -EINVAL;
-                               break;
-                       }
-
-                       memcpy (&fepriv->parameters_in, parg,
-                               sizeof (struct dvb_frontend_parameters));
-                       dtv_property_cache_init(fe, c);
-                       dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
-               }
-
-               /*
-                * Initialize output parameters to match the values given by
-                * the user. FE_SET_FRONTEND triggers an initial frontend event
-                * with status = 0, which copies output parameters to userspace.
-                */
-               fepriv->parameters_out = fepriv->parameters_in;
-
-               memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
-
-               /* force auto frequency inversion if requested */
-               if (dvb_force_auto_inversion) {
-                       c->inversion = INVERSION_AUTO;
-               }
-               if (fe->ops.info.type == FE_OFDM) {
-                       /* without hierarchical coding code_rate_LP is irrelevant,
-                        * so we tolerate the otherwise invalid FEC_NONE setting */
-                       if (c->hierarchy == HIERARCHY_NONE &&
-                           c->code_rate_LP == FEC_NONE)
-                               c->code_rate_LP = FEC_AUTO;
-               }
-
-               /* get frontend-specific tuning settings */
-               if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
-                       fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
-                       fepriv->max_drift = fetunesettings.max_drift;
-                       fepriv->step_size = fetunesettings.step_size;
-               } else {
-                       /* default values */
-                       switch(fe->ops.info.type) {
-                       case FE_QPSK:
-                               fepriv->min_delay = HZ/20;
-                               fepriv->step_size = c->symbol_rate / 16000;
-                               fepriv->max_drift = c->symbol_rate / 2000;
-                               break;
-
-                       case FE_QAM:
-                               fepriv->min_delay = HZ/20;
-                               fepriv->step_size = 0; /* no zigzag */
-                               fepriv->max_drift = 0;
-                               break;
-
-                       case FE_OFDM:
-                               fepriv->min_delay = HZ/20;
-                               fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
-                               fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
-                               break;
-                       case FE_ATSC:
-                               fepriv->min_delay = HZ/20;
-                               fepriv->step_size = 0;
-                               fepriv->max_drift = 0;
-                               break;
-                       }
-               }
-               if (dvb_override_tune_delay > 0)
-                       fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
-
-               fepriv->state = FESTATE_RETUNE;
-
-               /* Request the search algorithm to search */
-               fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
-
-               dvb_frontend_clear_events(fe);
-               dvb_frontend_add_event(fe, 0);
-               dvb_frontend_wakeup(fe);
-               fepriv->status = 0;
-               err = 0;
+       case FE_SET_FRONTEND:
+               err = dtv_set_frontend(file, cmd, parg);
                break;
-       }
-
        case FE_GET_EVENT:
                err = dvb_frontend_get_event (fe, parg, file->f_flags);
                break;