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https://github.com/torvalds/linux.git
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media: dvb_frontend: cleanup ioctl handling logic
Currently, there are two handlers for ioctls: - dvb_frontend_ioctl_properties() - dvb_frontend_ioctl_legacy() Despite their names, both handles non-legacy DVB ioctls. Besides that, there's no reason why to not handle all ioctls on a single handler function. So, merge them into a single function (dvb_frontend_handle_ioctl) and reorganize the ioctl's to indicate what's the current DVB API and what's deprecated. Despite the big diff, the handling logic for each ioctl is the same as before. Reviewed-by: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
2b5df42b8d
commit
d73dcf0cdb
@ -1298,10 +1298,8 @@ static int dtv_get_frontend(struct dvb_frontend *fe,
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return 0;
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}
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static int dvb_frontend_ioctl_legacy(struct file *file,
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unsigned int cmd, void *parg);
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static int dvb_frontend_ioctl_properties(struct file *file,
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unsigned int cmd, void *parg);
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static int dvb_frontend_handle_ioctl(struct file *file,
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unsigned int cmd, void *parg);
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static int dtv_property_process_get(struct dvb_frontend *fe,
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const struct dtv_frontend_properties *c,
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@ -1799,12 +1797,12 @@ static int dtv_property_process_set(struct dvb_frontend *fe,
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break;
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case DTV_VOLTAGE:
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c->voltage = tvp->u.data;
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r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
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r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
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(void *)c->voltage);
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break;
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case DTV_TONE:
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c->sectone = tvp->u.data;
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r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
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r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
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(void *)c->sectone);
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break;
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case DTV_CODE_RATE_HP:
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@ -1911,14 +1909,13 @@ static int dtv_property_process_set(struct dvb_frontend *fe,
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return r;
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}
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static int dvb_frontend_ioctl(struct file *file,
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unsigned int cmd, void *parg)
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static int dvb_frontend_ioctl(struct file *file, unsigned int cmd, void *parg)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dvb_frontend *fe = dvbdev->priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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int err = -EOPNOTSUPP;
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int err;
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dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
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if (down_interruptible(&fepriv->sem))
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@ -1936,121 +1933,13 @@ static int dvb_frontend_ioctl(struct file *file,
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return -EPERM;
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}
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if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
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err = dvb_frontend_ioctl_properties(file, cmd, parg);
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else {
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c->state = DTV_UNDEFINED;
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err = dvb_frontend_ioctl_legacy(file, cmd, parg);
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}
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c->state = DTV_UNDEFINED;
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err = dvb_frontend_handle_ioctl(file, cmd, parg);
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up(&fepriv->sem);
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return err;
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}
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static int dvb_frontend_ioctl_properties(struct file *file,
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unsigned int cmd, void *parg)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dvb_frontend *fe = dvbdev->priv;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int err, i;
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dev_dbg(fe->dvb->device, "%s:\n", __func__);
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switch(cmd) {
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case FE_SET_PROPERTY: {
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struct dtv_properties *tvps = parg;
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struct dtv_property *tvp = NULL;
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dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
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__func__, tvps->num);
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dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
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__func__, tvps->props);
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/*
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* Put an arbitrary limit on the number of messages that can
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* be sent at once
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*/
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if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
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return -EINVAL;
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tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
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if (IS_ERR(tvp))
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return PTR_ERR(tvp);
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for (i = 0; i < tvps->num; i++) {
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err = dtv_property_process_set(fe, tvp + i, file);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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(tvp + i)->result = err;
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}
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if (c->state == DTV_TUNE)
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dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
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kfree(tvp);
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break;
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}
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case FE_GET_PROPERTY: {
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struct dtv_properties *tvps = parg;
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struct dtv_property *tvp = NULL;
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struct dtv_frontend_properties getp = fe->dtv_property_cache;
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dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
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__func__, tvps->num);
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dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
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__func__, tvps->props);
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/*
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* Put an arbitrary limit on the number of messages that can
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* be sent at once
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*/
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if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
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return -EINVAL;
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tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
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if (IS_ERR(tvp))
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return PTR_ERR(tvp);
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/*
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* Let's use our own copy of property cache, in order to
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* avoid mangling with DTV zigzag logic, as drivers might
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* return crap, if they don't check if the data is available
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* before updating the properties cache.
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*/
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if (fepriv->state != FESTATE_IDLE) {
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err = dtv_get_frontend(fe, &getp, NULL);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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}
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for (i = 0; i < tvps->num; i++) {
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err = dtv_property_process_get(fe, &getp, tvp + i, file);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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(tvp + i)->result = err;
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}
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if (copy_to_user((void __user *)tvps->props, tvp,
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tvps->num * sizeof(struct dtv_property))) {
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kfree(tvp);
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return -EFAULT;
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}
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kfree(tvp);
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break;
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}
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default:
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return -ENOTSUPP;
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} /* switch */
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return 0;
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}
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static int dtv_set_frontend(struct dvb_frontend *fe)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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@ -2188,16 +2077,105 @@ static int dtv_set_frontend(struct dvb_frontend *fe)
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}
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static int dvb_frontend_ioctl_legacy(struct file *file,
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unsigned int cmd, void *parg)
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static int dvb_frontend_handle_ioctl(struct file *file,
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unsigned int cmd, void *parg)
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{
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struct dvb_device *dvbdev = file->private_data;
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struct dvb_frontend *fe = dvbdev->priv;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int err = -EOPNOTSUPP;
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int i, err;
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dev_dbg(fe->dvb->device, "%s:\n", __func__);
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switch(cmd) {
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case FE_SET_PROPERTY: {
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struct dtv_properties *tvps = parg;
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struct dtv_property *tvp = NULL;
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dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
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__func__, tvps->num);
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dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
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__func__, tvps->props);
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/*
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* Put an arbitrary limit on the number of messages that can
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* be sent at once
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*/
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if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
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return -EINVAL;
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tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
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if (IS_ERR(tvp))
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return PTR_ERR(tvp);
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for (i = 0; i < tvps->num; i++) {
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err = dtv_property_process_set(fe, tvp + i, file);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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(tvp + i)->result = err;
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}
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if (c->state == DTV_TUNE)
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dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
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kfree(tvp);
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break;
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}
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case FE_GET_PROPERTY: {
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struct dtv_properties *tvps = parg;
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struct dtv_property *tvp = NULL;
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struct dtv_frontend_properties getp = fe->dtv_property_cache;
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dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
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__func__, tvps->num);
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dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
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__func__, tvps->props);
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/*
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* Put an arbitrary limit on the number of messages that can
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* be sent at once
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*/
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if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
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return -EINVAL;
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tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
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if (IS_ERR(tvp))
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return PTR_ERR(tvp);
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/*
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* Let's use our own copy of property cache, in order to
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* avoid mangling with DTV zigzag logic, as drivers might
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* return crap, if they don't check if the data is available
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* before updating the properties cache.
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*/
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if (fepriv->state != FESTATE_IDLE) {
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err = dtv_get_frontend(fe, &getp, NULL);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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}
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for (i = 0; i < tvps->num; i++) {
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err = dtv_property_process_get(fe, &getp, tvp + i, file);
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if (err < 0) {
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kfree(tvp);
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return err;
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}
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(tvp + i)->result = err;
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}
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if (copy_to_user((void __user *)tvps->props, tvp,
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tvps->num * sizeof(struct dtv_property))) {
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kfree(tvp);
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return -EFAULT;
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}
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kfree(tvp);
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break;
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}
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switch (cmd) {
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case FE_GET_INFO: {
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struct dvb_frontend_info* info = parg;
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@ -2261,42 +2239,6 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
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break;
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}
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case FE_READ_BER:
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if (fe->ops.read_ber) {
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if (fepriv->thread)
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err = fe->ops.read_ber(fe, (__u32 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_READ_SIGNAL_STRENGTH:
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if (fe->ops.read_signal_strength) {
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if (fepriv->thread)
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err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_READ_SNR:
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if (fe->ops.read_snr) {
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if (fepriv->thread)
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err = fe->ops.read_snr(fe, (__u16 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_READ_UNCORRECTED_BLOCKS:
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if (fe->ops.read_ucblocks) {
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if (fepriv->thread)
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err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_DISEQC_RESET_OVERLOAD:
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if (fe->ops.diseqc_reset_overload) {
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err = fe->ops.diseqc_reset_overload(fe);
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@ -2348,6 +2290,23 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
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}
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break;
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case FE_DISEQC_RECV_SLAVE_REPLY:
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if (fe->ops.diseqc_recv_slave_reply)
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err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
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break;
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case FE_ENABLE_HIGH_LNB_VOLTAGE:
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if (fe->ops.enable_high_lnb_voltage)
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err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
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break;
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case FE_SET_FRONTEND_TUNE_MODE:
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fepriv->tune_mode_flags = (unsigned long) parg;
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err = 0;
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break;
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/* DEPRECATED dish control ioctls */
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case FE_DISHNETWORK_SEND_LEGACY_CMD:
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if (fe->ops.dishnetwork_send_legacy_command) {
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err = fe->ops.dishnetwork_send_legacy_command(fe,
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@ -2413,16 +2372,46 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
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}
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break;
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case FE_DISEQC_RECV_SLAVE_REPLY:
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if (fe->ops.diseqc_recv_slave_reply)
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err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
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/* DEPRECATED statistics ioctls */
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case FE_READ_BER:
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if (fe->ops.read_ber) {
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if (fepriv->thread)
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err = fe->ops.read_ber(fe, (__u32 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_ENABLE_HIGH_LNB_VOLTAGE:
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if (fe->ops.enable_high_lnb_voltage)
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err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
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case FE_READ_SIGNAL_STRENGTH:
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if (fe->ops.read_signal_strength) {
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if (fepriv->thread)
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err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_READ_SNR:
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if (fe->ops.read_snr) {
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if (fepriv->thread)
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err = fe->ops.read_snr(fe, (__u16 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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case FE_READ_UNCORRECTED_BLOCKS:
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if (fe->ops.read_ucblocks) {
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if (fepriv->thread)
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err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
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else
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err = -EAGAIN;
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}
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break;
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/* DEPRECATED DVBv3 ioctls */
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case FE_SET_FRONTEND:
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err = dvbv3_set_delivery_system(fe);
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if (err)
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@ -2449,11 +2438,10 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
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err = dtv_get_frontend(fe, &getp, parg);
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break;
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}
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case FE_SET_FRONTEND_TUNE_MODE:
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fepriv->tune_mode_flags = (unsigned long) parg;
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err = 0;
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break;
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}
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default:
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return -ENOTSUPP;
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} /* switch */
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return err;
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}
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