[media] DVB: dtv_property_cache_submit shouldn't modifiy the cache

- Use const pointers and remove assignments.
- delivery_system already gets assigned by DTV_DELIVERY_SYSTEM
  and dtv_property_cache_sync.

Signed-off-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 10 deletions

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 3639edce65e0..67558bd26d89 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -1074,7 +1074,7 @@ static void dtv_property_cache_sync(struct dvb_frontend *fe,
  */
 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
 {
-        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
         struct dvb_frontend_private *fepriv = fe->frontend_priv;
         struct dvb_frontend_parameters *p = &fepriv->parameters;
 
@@ -1086,14 +1086,12 @@ static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
                 dprintk("%s() Preparing QPSK req\n", __func__);
                 p->u.qpsk.symbol_rate = c->symbol_rate;
                 p->u.qpsk.fec_inner = c->fec_inner;
-                c->delivery_system = SYS_DVBS;
                 break;
         case FE_QAM:
                 dprintk("%s() Preparing QAM req\n", __func__);
                 p->u.qam.symbol_rate = c->symbol_rate;
                 p->u.qam.fec_inner = c->fec_inner;
                 p->u.qam.modulation = c->modulation;
-                c->delivery_system = SYS_DVBC_ANNEX_AC;
                 break;
         case FE_OFDM:
                 dprintk("%s() Preparing OFDM req\n", __func__);
@@ -1111,15 +1109,10 @@ static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
                 p->u.ofdm.transmission_mode = c->transmission_mode;
                 p->u.ofdm.guard_interval = c->guard_interval;
                 p->u.ofdm.hierarchy_information = c->hierarchy;
-                c->delivery_system = SYS_DVBT;
                 break;
         case FE_ATSC:
                 dprintk("%s() Preparing VSB req\n", __func__);
                 p->u.vsb.modulation = c->modulation;
-                if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
-                        c->delivery_system = SYS_ATSC;
-                else
-                        c->delivery_system = SYS_DVBC_ANNEX_B;
                 break;
         }
 }
@@ -1129,7 +1122,7 @@ static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
  */
 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
 {
-        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
         struct dvb_frontend_private *fepriv = fe->frontend_priv;
         struct dvb_frontend_parameters *p = &fepriv->parameters;
 
@@ -1170,7 +1163,7 @@ static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
 
 static void dtv_property_cache_submit(struct dvb_frontend *fe)
 {
-        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 
         /* For legacy delivery systems we don't need the delivery_system to
          * be specified, but we populate the older structures from the cache