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Diffstat (limited to 'net/mac80211/main.c')
-rw-r--r--net/mac80211/main.c33
1 files changed, 29 insertions, 4 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index c155c0b69426..2543e48bd813 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -34,7 +34,7 @@
#include "debugfs.h"
-bool ieee80211_disable_40mhz_24ghz;
+static bool ieee80211_disable_40mhz_24ghz;
module_param(ieee80211_disable_40mhz_24ghz, bool, 0644);
MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz,
"Disable 40MHz support in the 2.4GHz band");
@@ -112,7 +112,13 @@ bool ieee80211_cfg_on_oper_channel(struct ieee80211_local *local)
/* This logic needs to match logic in ieee80211_hw_config */
if (local->scan_channel) {
chan = local->scan_channel;
- channel_type = NL80211_CHAN_NO_HT;
+ /* If scanning on oper channel, use whatever channel-type
+ * is currently in use.
+ */
+ if (chan == local->oper_channel)
+ channel_type = local->_oper_channel_type;
+ else
+ channel_type = NL80211_CHAN_NO_HT;
} else if (local->tmp_channel) {
chan = scan_chan = local->tmp_channel;
channel_type = local->tmp_channel_type;
@@ -151,7 +157,13 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
if (scan_chan) {
chan = scan_chan;
- channel_type = NL80211_CHAN_NO_HT;
+ /* If scanning on oper channel, use whatever channel-type
+ * is currently in use.
+ */
+ if (chan == local->oper_channel)
+ channel_type = local->_oper_channel_type;
+ else
+ channel_type = NL80211_CHAN_NO_HT;
} else if (local->tmp_channel) {
chan = scan_chan = local->tmp_channel;
channel_type = local->tmp_channel_type;
@@ -187,7 +199,8 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
changed |= IEEE80211_CONF_CHANGE_SMPS;
}
- if (scan_chan)
+ if ((local->scanning & SCAN_SW_SCANNING) ||
+ (local->scanning & SCAN_HW_SCANNING))
power = chan->max_power;
else
power = local->power_constr_level ?
@@ -710,6 +723,18 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
}
channels += sband->n_channels;
+ /*
+ * Since ieee80211_disable_40mhz_24ghz is global, we can
+ * modify the sband's ht data even if the driver uses a
+ * global structure for that.
+ */
+ if (ieee80211_disable_40mhz_24ghz &&
+ band == IEEE80211_BAND_2GHZ &&
+ sband->ht_cap.ht_supported) {
+ sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+ sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
+ }
+
if (max_bitrates < sband->n_bitrates)
max_bitrates = sband->n_bitrates;
supp_ht = supp_ht || sband->ht_cap.ht_supported;