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path: root/drivers/media/dvb-frontends/cxd2841er.c
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Diffstat (limited to 'drivers/media/dvb-frontends/cxd2841er.c')
-rw-r--r--drivers/media/dvb-frontends/cxd2841er.c12
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;
}