V4L/DVB (9004): S2API: Implement GET/SET handing to the demods

The frontends will be notified (if they chose) of all _get and _set commands
so they can help determine result or action. Results are now returned
to userspace correctly.
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/dvb-core/dvb_frontend.c

@@ -1104,6 +1104,13 @@ int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
 
 	dtv_property_dump(tvp);
 
+	/* Allow the frontend to validate incoming properties */
+	if (fe->ops.get_property)
+		r = fe->ops.get_property(fe, tvp);
+
+	if (r < 0)
+		return r;
+
 	switch(tvp->cmd) {
 	case DTV_FREQUENCY:
 		tvp->u.data = fe->dtv_property_cache.frequency;
@@ -1188,6 +1195,13 @@ int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
 	printk("%s()\n", __FUNCTION__);
 	dtv_property_dump(tvp);
 
+	/* Allow the frontend to validate incoming properties */
+	if (fe->ops.set_property)
+		r = fe->ops.set_property(fe, tvp);
+
+	if (r < 0)
+		return r;
+
 	switch(tvp->cmd) {
 	case DTV_CLEAR:
 		/* Reset a cache of data specific to the frontend here. This does
@@ -1331,12 +1345,12 @@ static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
 		}
 
 		for (i = 0; i < tvps->num; i++)
-			dtv_property_process_set(fe, tvp + i, inode, file);
+			err |= dtv_property_process_set(fe, tvp + i, inode, file);
 
 		if(fe->dtv_property_cache.state == DTV_TUNE) {
 			printk("%s() Property cache is full, tuning\n", __FUNCTION__);
 		}
-		err = 0;
+
 	} else
 	if(cmd == FE_GET_PROPERTY) {
 		printk("%s() FE_GET_PROPERTY\n", __FUNCTION__);
@@ -1364,14 +1378,13 @@ static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
 		}
 
 		for (i = 0; i < tvps->num; i++)
-			dtv_property_process_get(fe, tvp + i, inode, file);
+			err |= dtv_property_process_get(fe, tvp + i, inode, file);
 
 		if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
 			err = -EFAULT;
 			goto out;
 		}
 
-		err = 0;
 	} else
 		err = -EOPNOTSUPP;
 

drivers/media/dvb/dvb-core/dvb_frontend.h

@@ -172,7 +172,6 @@ struct dvb_frontend_ops {
 
 	int (*set_property)(struct dvb_frontend* fe, struct dtv_property* tvp);
 	int (*get_property)(struct dvb_frontend* fe, struct dtv_property* tvp);
-	int (*set_params)(struct dvb_frontend* fe);
 };
 
 #define MAX_EVENT 8

drivers/media/dvb/frontends/cx24116.c

@@ -802,9 +802,9 @@ static int cx24116_set_property(struct dvb_frontend *fe, struct dtv_property* tv
 	return 0;
 }
 
-static int cx24116_set_params(struct dvb_frontend *fe)
+static int cx24116_get_property(struct dvb_frontend *fe, struct dtv_property* tvp)
 {
-	dprintk("%s(..) We were notified that a tune request may occur\n", __func__);
+	dprintk("%s(..)\n", __func__);
 	return 0;
 }
 
@@ -964,7 +964,7 @@ static struct dvb_frontend_ops cx24116_ops = {
 	.diseqc_send_burst = cx24116_diseqc_send_burst,
 
 	.set_property = cx24116_set_property,
-	.set_params = cx24116_set_params,
+	.get_property = cx24116_get_property,
 	.set_frontend = cx24116_set_frontend,
 };