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[media] cx24120: make sure tuner is locked at get_frontend

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Change get_frontend to re-check current lock status rather than relying
on a cached value from get_status. Removes potential for tuning failure
if get_frontend is called during tuning.

Probably not too essential as other changes work around this:
https://patchwork.linuxtv.org/patch/32845/

Signed-off-by: Jemma Denson <jdenson@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Jemma Denson 2016-02-28 15:29:50 -03:00 committed by Mauro Carvalho Chehab
parent 565e37d168
commit 035cad576d
1 changed files with 3 additions and 1 deletions
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4
drivers/media/dvb-frontends/cx24120.c
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@ -1507,11 +1507,13 @@ static int cx24120_get_frontend(struct dvb_frontend *fe,
{
struct cx24120_state *state = fe->demodulator_priv;
u8 freq1, freq2, freq3;
int status;
dev_dbg(&state->i2c->dev, "\n");
/* don't return empty data if we're not tuned in */
if ((state->fe_status & FE_HAS_LOCK) == 0)
status = cx24120_readreg(state, CX24120_REG_STATUS);
if (!(status & CX24120_HAS_LOCK))
return 0;
/* Get frequency */