From: Bob Copeland <me@bobcopeland.com>
Date: Sat, 16 Jan 2010 19:36:53 +0000 (-0500)
Subject: mac80211: pid: replace open-coded msecs_to_jiffies
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8e9310c1790566ea2de2e8b6e1c04bacbbee648c;p=openwrt%2Fstaging%2Fblogic.git

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 29bc4c516238..2652a374974e 100644
--- 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);
 }