diff options
| author | Janne Grunau <j@jannau.net> | 2009-09-02 00:24:08 +0200 |
|---|---|---|
| committer | Janne Grunau <j@jannau.net> | 2009-09-02 00:24:08 +0200 |
| commit | 47515034f52a7a8848e3636668e31e1af4a79fbe (patch) | |
| tree | b801b778fbe2bdd28f93758471138ad40fed3c4e /linux/drivers/media | |
| parent | 39c7c8c56d56cc3a3fd5128d0598944303a929df (diff) | |
| download | mediapointer-dvb-s2-47515034f52a7a8848e3636668e31e1af4a79fbe.tar.gz mediapointer-dvb-s2-47515034f52a7a8848e3636668e31e1af4a79fbe.tar.bz2 | |
dvb-core: check supported QAM modulations
From: Janne Grunau <j@jannau.net>
Check the modulation in dvb_frontend_check_parameters against
frontend's capabilties for FE_QAM devices.
Priority: normal
Signed-off-by: Janne Grunau <j@jannau.net>
Diffstat (limited to 'linux/drivers/media')
| -rw-r--r-- | linux/drivers/media/dvb/dvb-core/dvb_frontend.c | 9 |
1 files changed, 9 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 fbfccbd91..56a11d32a 100644 --- a/linux/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/linux/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -849,6 +849,15 @@ static int dvb_frontend_check_parameters(struct dvb_frontend *fe, } } + /* check for supported modulation */ + if (fe->ops.info.type == FE_QAM && + (parms->u.qam.modulation > QAM_AUTO || + !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) { + printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n", + fe->dvb->num, fe->id, parms->u.qam.modulation); + return -EINVAL; + } + return 0; } |