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[media] cxd2820r: do not allow get_frontend() when demod is not initialized 

This fixes bug introduced by multi-frontend to single-frontend change.

Finally HAS_LOCK is got back!
We are not allowed to access hardware in sleep mode...
Chip did not like when .get_frontend() reads some registers while
chip was sleeping and due to that HAS_LOCK bit was never gained.

TODO: We should add logic for dvb-core to drop out illegal calls like that.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-01-15 18:30:36 -03:00 committed by Mauro Carvalho Chehab
parent 1f64972937
commit 3b6a567afa
1 changed files with 5 additions and 0 deletions
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5
drivers/media/dvb/frontends/cxd2820r_core.c
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@ -309,9 +309,14 @@ static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
static int cxd2820r_get_frontend(struct dvb_frontend *fe) static int cxd2820r_get_frontend(struct dvb_frontend *fe)
{ {
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret; int ret;
dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system); dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
if (priv->delivery_system == SYS_UNDEFINED)
return 0;
switch (fe->dtv_property_cache.delivery_system) { switch (fe->dtv_property_cache.delivery_system) {
case SYS_DVBT: case SYS_DVBT:
ret = cxd2820r_get_frontend_t(fe); ret = cxd2820r_get_frontend_t(fe);