[media] dvb_frontend: add props argument to dtv_get_frontend()

Instead of implicitly using the DTV cache properties at
dtv_get_frontend(), pass it as an additional argument.

This patch prepares to use a separate cache for G_PROPERTY,
in order to avoid it to mangle with the DVB thread
zigzag logic.

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

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index b1255b7..ca6d60f 100644 (file)
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -140,9 +140,12 @@ struct dvb_frontend_private {
 
 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 static int dtv_get_frontend(struct dvb_frontend *fe,
+                           struct dtv_frontend_properties *c,
                            struct dvb_frontend_parameters *p_out);
-static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
-                                          struct dvb_frontend_parameters *p);
+static int
+dtv_property_legacy_params_sync(struct dvb_frontend *fe,
+                               const struct dtv_frontend_properties *c,
+                               struct dvb_frontend_parameters *p);
 
 static bool has_get_frontend(struct dvb_frontend *fe)
 {
@@ -202,6 +205,7 @@ static void dvb_frontend_add_event(struct dvb_frontend *fe,
                                   enum fe_status status)
 {
        struct dvb_frontend_private *fepriv = fe->frontend_priv;
+       struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct dvb_fe_events *events = &fepriv->events;
        struct dvb_frontend_event *e;
        int wp;
@@ -209,7 +213,7 @@ static void dvb_frontend_add_event(struct dvb_frontend *fe,
        dev_dbg(fe->dvb->device, "%s:\n", __func__);
 
        if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
-               dtv_get_frontend(fe, &fepriv->parameters_out);
+               dtv_get_frontend(fe, c, &fepriv->parameters_out);
 
        mutex_lock(&events->mtx);
 
@@ -687,6 +691,7 @@ static int dvb_enable_media_tuner(struct dvb_frontend *fe)
 static int dvb_frontend_thread(void *data)
 {
        struct dvb_frontend *fe = data;
+       struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct dvb_frontend_private *fepriv = fe->frontend_priv;
        enum fe_status s;
        enum dvbfe_algo algo;
@@ -807,7 +812,7 @@ restart:
                                        fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
                                        fepriv->delay = HZ / 2;
                                }
-                               dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
+                               dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
                                fe->ops.read_status(fe, &s);
                                if (s != fepriv->status) {
                                        dvb_frontend_add_event(fe, s); /* update event list */
@@ -1274,11 +1279,11 @@ static int dtv_property_cache_sync(struct dvb_frontend *fe,
 /* Ensure the cached values are set correctly in the frontend
  * legacy tuning structures, for the advanced tuning API.
  */
-static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
-                                           struct dvb_frontend_parameters *p)
+static int
+dtv_property_legacy_params_sync(struct dvb_frontend *fe,
+                               const struct dtv_frontend_properties *c,
+                               struct dvb_frontend_parameters *p)
 {
-       const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-
        p->frequency = c->frequency;
        p->inversion = c->inversion;
 
@@ -1350,6 +1355,7 @@ static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
  * If p_out is not null, it will update the DVBv3 params pointed by it.
  */
 static int dtv_get_frontend(struct dvb_frontend *fe,
+                           struct dtv_frontend_properties *c,
                            struct dvb_frontend_parameters *p_out)
 {
        int r;
@@ -1359,7 +1365,7 @@ static int dtv_get_frontend(struct dvb_frontend *fe,
                if (unlikely(r < 0))
                        return r;
                if (p_out)
-                       dtv_property_legacy_params_sync(fe, p_out);
+                       dtv_property_legacy_params_sync(fe, c, p_out);
                return 0;
        }
 
@@ -2107,7 +2113,7 @@ static int dvb_frontend_ioctl_properties(struct file *file,
                 * is not idle. Otherwise, returns the cached content
                 */
                if (fepriv->state != FESTATE_IDLE) {
-                       err = dtv_get_frontend(fe, NULL);
+                       err = dtv_get_frontend(fe, c, NULL);
                        if (err < 0)
                                goto out;
                }
@@ -2147,7 +2153,7 @@ static int dtv_set_frontend(struct dvb_frontend *fe)
         * the user. FE_SET_FRONTEND triggers an initial frontend event
         * with status = 0, which copies output parameters to userspace.
         */
-       dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
+       dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 
        /*
         * Be sure that the bandwidth will be filled for all
@@ -2518,7 +2524,7 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
                break;
 
        case FE_GET_FRONTEND:
-               err = dtv_get_frontend(fe, parg);
+               err = dtv_get_frontend(fe, c, parg);
                break;
 
        case FE_SET_FRONTEND_TUNE_MODE: