diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-07-27 11:39:10 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-07-27 11:39:10 -0300 |
| commit | b6404404a48e37352cbec31aceb1aefa537b58fb (patch) | |
| tree | da6d8d302f771446446c88b75a6c326a60511f35 /linux/drivers/media/dvb/dvb-core | |
| parent | 26cbffaaba504abd01e6378d5858b21421a3c713 (diff) | |
| parent | d0ccc4154b14a4a997095cf4d7e32d2534636dd6 (diff) | |
| download | mediapointer-dvb-s2-b6404404a48e37352cbec31aceb1aefa537b58fb.tar.gz mediapointer-dvb-s2-b6404404a48e37352cbec31aceb1aefa537b58fb.tar.bz2 | |
merge: http://linuxtv.org/hg/~endriss/v4l-dvb
From: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'linux/drivers/media/dvb/dvb-core')
| -rw-r--r-- | linux/drivers/media/dvb/dvb-core/dvb_frontend.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/linux/drivers/media/dvb/dvb-core/dvb_frontend.c b/linux/drivers/media/dvb/dvb-core/dvb_frontend.c index 18c4997cf..08e92187d 100644 --- a/linux/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/linux/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -702,6 +702,47 @@ static int dvb_frontend_start(struct dvb_frontend *fe) return 0; } +static int dvb_frontend_check_parameters(struct dvb_frontend *fe, + struct dvb_frontend_parameters *parms) +{ + /* 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)) { + 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); + return -EINVAL; + } + + /* range check: symbol rate */ + if (fe->ops.info.type == FE_QPSK) { + if ((fe->ops.info.symbol_rate_min && + parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) || + (fe->ops.info.symbol_rate_max && + parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) { + printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", + fe->dvb->num, parms->u.qpsk.symbol_rate, + fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); + return -EINVAL; + } + + } else if (fe->ops.info.type == FE_QAM) { + if ((fe->ops.info.symbol_rate_min && + parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) || + (fe->ops.info.symbol_rate_max && + parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) { + printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", + fe->dvb->num, parms->u.qam.symbol_rate, + fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); + return -EINVAL; + } + } + + return 0; +} + static int dvb_frontend_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *parg) { @@ -888,6 +929,11 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file, case FE_SET_FRONTEND: { struct dvb_frontend_tune_settings fetunesettings; + if (dvb_frontend_check_parameters(fe, parg) < 0) { + err = -EINVAL; + break; + } + memcpy (&fepriv->parameters, parg, sizeof (struct dvb_frontend_parameters)); |