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mac80211: suppress unchanged "limiting TX power" messages

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When the AP is advertising limited TX power, the message can be
printed over and over again. Suppress it when the power level
isn't changing.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=106011

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-12-08 16:04:37 +02:00
parent 1ea2c86480
commit a87da0cbc4
1 changed files with 10 additions and 5 deletions
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15
net/mac80211/mlme.c
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@ -1379,21 +1379,26 @@ static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
*/
if (has_80211h_pwr &&
(!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
new_ap_level = pwr_level_80211h;
if (sdata->ap_power_level == new_ap_level)
return 0;
sdata_dbg(sdata,
"Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
sdata->u.mgd.bssid);
new_ap_level = pwr_level_80211h;
} else { /* has_cisco_pwr is always true here. */
new_ap_level = pwr_level_cisco;
if (sdata->ap_power_level == new_ap_level)
return 0;
sdata_dbg(sdata,
"Limiting TX power to %d dBm as advertised by %pM\n",
pwr_level_cisco, sdata->u.mgd.bssid);
new_ap_level = pwr_level_cisco;
}
if (sdata->ap_power_level == new_ap_level)
return 0;
sdata->ap_power_level = new_ap_level;
if (__ieee80211_recalc_txpower(sdata))
return BSS_CHANGED_TXPOWER;