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[media] dib8000: Fix the sleep time at the state machine 

msleep() is not too precise: its precision depends on the
HZ config. As the driver selects precise timings for the
state machine, change it to usleep_range().

Acked-By: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2014-07-04 14:15:35 -03:00
parent 40d1a7c3de
commit 4607bb7a47
1 changed files with 12 additions and 3 deletions
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15
drivers/media/dvb-frontends/dib8000.c
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@ -3606,10 +3606,19 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
else if ((time_slave != FE_CALLBACK_TIME_NEVER) && (time_slave > time))
time = time_slave;
}
if (time != FE_CALLBACK_TIME_NEVER)
msleep(time / 10);
else
if (time == FE_CALLBACK_TIME_NEVER)
break;
/*
* Despite dib8000_agc_startup returns time at a 0.1 ms range,
* the actual sleep time depends on CONFIG_HZ. The worse case
* is when CONFIG_HZ=100. In such case, the minimum granularity
* is 10ms. On some real field tests, the tuner sometimes don't
* lock when this timer is lower than 10ms. So, enforce a 10ms
* granularity.
*/
time = 10 * (time + 99)/100;
usleep_range(time * 1000, (time + 1) * 1000);
exit_condition = 1;
for (index_frontend = 0; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
if (dib8000_get_tune_state(state->fe[index_frontend]) != CT_AGC_STOP) {