diff options
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index fd9bac5eb25e..1a1b2405b0f4 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -697,17 +697,35 @@ static int dvb_frontend_start(struct dvb_frontend *fe) return 0; } +static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe, + u32 *freq_min, u32 *freq_max) +{ + *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); + + if (fe->ops.info.frequency_max == 0) + *freq_max = fe->ops.tuner_ops.info.frequency_max; + else if (fe->ops.tuner_ops.info.frequency_max == 0) + *freq_max = fe->ops.info.frequency_max; + else + *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); + + if (*freq_min == 0 || *freq_max == 0) + printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n", + fe->dvb->num); +} + static int dvb_frontend_check_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *parms) { + u32 freq_min; + u32 freq_max; + /* range check: frequency */ - if ((fe->ops.info.frequency_min && - parms->frequency < fe->ops.info.frequency_min) || - (fe->ops.info.frequency_max && - parms->frequency > fe->ops.info.frequency_max)) { + dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max); + if ((freq_min && parms->frequency < freq_min) || + (freq_max && parms->frequency > freq_max)) { printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n", - fe->dvb->num, parms->frequency, - fe->ops.info.frequency_min, fe->ops.info.frequency_max); + fe->dvb->num, parms->frequency, freq_min, freq_max); return -EINVAL; } @@ -763,6 +781,7 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file, case FE_GET_INFO: { struct dvb_frontend_info* info = parg; memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); + dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max); /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't * do it, it is done for it. */ |