diff options
Diffstat (limited to 'drivers/media/dvb-frontends/cxd2841er.c')
| -rw-r--r-- | drivers/media/dvb-frontends/cxd2841er.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/cxd2841er.c b/drivers/media/dvb-frontends/cxd2841er.c index 1b30cf570803..758c95bc3b11 100644 --- a/drivers/media/dvb-frontends/cxd2841er.c +++ b/drivers/media/dvb-frontends/cxd2841er.c @@ -60,6 +60,7 @@ struct cxd2841er_priv { enum cxd2841er_xtal xtal; enum fe_caps caps; u32 flags; + unsigned long stats_time; }; static const struct cxd2841er_cnr_data s_cn_data[] = { @@ -3279,9 +3280,15 @@ static int cxd2841er_get_frontend(struct dvb_frontend *fe, p->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; if (status & FE_HAS_LOCK) { + if (priv->stats_time && + (!time_after(jiffies, priv->stats_time))) + return 0; + + /* Prevent retrieving stats faster than once per second */ + priv->stats_time = jiffies + msecs_to_jiffies(1000); + cxd2841er_read_snr(fe); cxd2841er_read_ucblocks(fe); - cxd2841er_read_ber(fe); } else { p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; @@ -3360,6 +3367,9 @@ done: p->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; p->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + /* Reset the wait for jiffies logic */ + priv->stats_time = 0; + return ret; } |