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--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -585,6 +585,7 @@ struct ath_softc {
struct ieee80211_hw *hw;
struct device *dev;
+ u32 chan_bw;
int chan_idx;
int chan_is_ht;
struct survey_info *cur_survey;
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1693,6 +1693,9 @@ int ath9k_init_debug(struct ath_hw *ah)
debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
&fops_eeprom);
+ debugfs_create_u32("chanbw", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+ &sc->chan_bw);
+
sc->debug.regidx = 0;
memset(&sc->debug.bb_mac_samp, 0, sizeof(sc->debug.bb_mac_samp));
sc->debug.sampidx = 0;
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1636,9 +1636,10 @@ static int ath9k_config(struct ieee80211
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
- struct ath9k_channel old_chan;
+ struct ath9k_channel old_chan, *hchan;
int pos = curchan->hw_value;
int old_pos = -1;
+ u32 oldflags;
unsigned long flags;
if (ah->curchan)
@@ -1691,7 +1692,23 @@ static int ath9k_config(struct ieee80211
memset(&sc->survey[pos], 0, sizeof(struct survey_info));
}
- if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
+ hchan = &sc->sc_ah->channels[pos];
+ oldflags = hchan->channelFlags;
+ switch (sc->chan_bw) {
+ case 5:
+ hchan->channelFlags &= ~CHANNEL_HALF;
+ hchan->channelFlags |= CHANNEL_QUARTER;
+ break;
+ case 10:
+ hchan->channelFlags &= ~CHANNEL_QUARTER;
+ hchan->channelFlags |= CHANNEL_HALF;
+ break;
+ default:
+ hchan->channelFlags &= ~(CHANNEL_HALF | CHANNEL_QUARTER);
+ break;
+ }
+
+ if (ath_set_channel(sc, hw, hchan) < 0) {
ath_err(common, "Unable to set channel\n");
mutex_unlock(&sc->mutex);
return -EINVAL;
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1509,6 +1509,10 @@ int ath9k_hw_reset(struct ath_hw *ah, st
(AR_SREV_9300_20_OR_LATER(ah) && IS_CHAN_5GHZ(chan)))
bChannelChange = false;
+ if (!ah->curchan || ((ah->curchan->channelFlags ^ chan->channelFlags) &
+ (CHANNEL_HALF | CHANNEL_QUARTER)))
+ bChannelChange = false;
+
if (bChannelChange &&
(ah->chip_fullsleep != true) &&
(ah->curchan != NULL) &&
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