1 files changed, 1 insertions, 1 deletions

diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index 631e46888267..b84e51480c84 100644
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -210,7 +210,7 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo,
         rate_control_pid_normalize(pinfo, mode->num_rates);
 
         /* Compute the proportional, integral and derivative errors. */
-        err_prop = pinfo->target - pf;
+        err_prop = (pinfo->target << RC_PID_ARITH_SHIFT) - pf;
 
         err_avg = spinfo->err_avg_sc >> pinfo->smoothing_shift;
         spinfo->err_avg_sc = spinfo->err_avg_sc - err_avg + err_prop;