mac80211: pid: replace open-coded msecs_to_jiffies

Code directly scaling by HZ and rounding can be more efficiently
and clearly performed with msecs_to_jiffies.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index 29bc4c5..2652a37 100644 (file)
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -157,9 +157,7 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo,
 
        /* In case nothing happened during the previous control interval, turn
         * the sharpening factor on. */
-       period = (HZ * pinfo->sampling_period + 500) / 1000;
-       if (!period)
-               period = 1;
+       period = msecs_to_jiffies(pinfo->sampling_period);
        if (jiffies - spinfo->last_sample > 2 * period)
                spinfo->sharp_cnt = pinfo->sharpen_duration;
 
@@ -252,9 +250,7 @@ static void rate_control_pid_tx_status(void *priv, struct ieee80211_supported_ba
        }
 
        /* Update PID controller state. */
-       period = (HZ * pinfo->sampling_period + 500) / 1000;
-       if (!period)
-               period = 1;
+       period = msecs_to_jiffies(pinfo->sampling_period);
        if (time_after(jiffies, spinfo->last_sample + period))
                rate_control_pid_sample(pinfo, sband, sta, spinfo);
 }