--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1461,6 +1461,52 @@ static const struct file_operations fops
 	.owner = THIS_MODULE
 };
 
+
+static ssize_t read_file_chan_bw(struct file *file, char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	char buf[32];
+	unsigned int len;
+
+	len = sprintf(buf, "0x%08x\n", common->chan_bw);
+	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t write_file_chan_bw(struct file *file, const char __user *user_buf,
+			     size_t count, loff_t *ppos)
+{
+	struct ath_softc *sc = file->private_data;
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	unsigned long chan_bw;
+	char buf[32];
+	ssize_t len;
+
+	len = min(count, sizeof(buf) - 1);
+	if (copy_from_user(buf, user_buf, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+	if (kstrtoul(buf, 0, &chan_bw))
+		return -EINVAL;
+
+	common->chan_bw = chan_bw;
+	if (!test_bit(ATH_OP_INVALID, &common->op_flags))
+		ath9k_ops.config(sc->hw, IEEE80211_CONF_CHANGE_CHANNEL);
+
+	return count;
+}
+
+static const struct file_operations fops_chanbw = {
+	.read = read_file_chan_bw,
+	.write = write_file_chan_bw,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+
 int ath9k_init_debug(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
@@ -1482,6 +1528,8 @@ int ath9k_init_debug(struct ath_hw *ah)
 
 	debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_eeprom);
+	debugfs_create_file("chanbw", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
+			    sc, &fops_chanbw);
 	debugfs_create_devm_seqfile(sc->dev, "dma", sc->debug.debugfs_phy,
 				    read_file_dma);
 	debugfs_create_devm_seqfile(sc->dev, "interrupt", sc->debug.debugfs_phy,
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -151,6 +151,7 @@ struct ath_common {
 	int debug_mask;
 	enum ath_device_state state;
 	unsigned long op_flags;
+	u32 chan_bw;
 
 	struct ath_ani ani;
 
--- a/drivers/net/wireless/ath/ath9k/common.c
+++ b/drivers/net/wireless/ath/ath9k/common.c
@@ -297,11 +297,13 @@ EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_ke
 /*
  * Update internal channel flags.
  */
-static void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
+static void ath9k_cmn_update_ichannel(struct ath_common *common,
+				      struct ath9k_channel *ichan,
 				      struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_channel *chan = chandef->chan;
 	u16 flags = 0;
+	int width;
 
 	ichan->channel = chan->center_freq;
 	ichan->chan = chan;
@@ -309,7 +311,19 @@ static void ath9k_cmn_update_ichannel(st
 	if (chan->band == NL80211_BAND_5GHZ)
 		flags |= CHANNEL_5GHZ;
 
-	switch (chandef->width) {
+	switch (common->chan_bw) {
+	case 5:
+		width = NL80211_CHAN_WIDTH_5;
+		break;
+	case 10:
+		width = NL80211_CHAN_WIDTH_10;
+		break;
+	default:
+		width = chandef->width;
+		break;
+	}
+
+	switch (width) {
 	case NL80211_CHAN_WIDTH_5:
 		flags |= CHANNEL_QUARTER;
 		break;
@@ -342,10 +356,11 @@ struct ath9k_channel *ath9k_cmn_get_chan
 					    struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_channel *curchan = chandef->chan;
+	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath9k_channel *channel;
 
 	channel = &ah->channels[curchan->hw_value];
-	ath9k_cmn_update_ichannel(channel, chandef);
+	ath9k_cmn_update_ichannel(common, channel, chandef);
 
 	return channel;
 }