1 files changed, 13 insertions, 16 deletions

diff --git a/drivers/net/wireless/ath/ath9k/tx99.c b/drivers/net/wireless/ath/ath9k/tx99.c
index 49ed1afb913c..f2144fd39093 100644
--- a/drivers/net/wireless/ath/ath9k/tx99.c
+++ b/drivers/net/wireless/ath/ath9k/tx99.c
@@ -56,11 +56,6 @@ static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
 	struct sk_buff *skb;
 	struct ath_vif *avp;
 
-	if (!sc->tx99_vif)
-		return NULL;
-
-	avp = (struct ath_vif *)sc->tx99_vif->drv_priv;
-
 	skb = alloc_skb(len, GFP_KERNEL);
 	if (!skb)
 		return NULL;
@@ -77,7 +72,10 @@ static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
 	memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
 	memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
 
-	hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
+	if (sc->tx99_vif) {
+		avp = (struct ath_vif *) sc->tx99_vif->drv_priv;
+		hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
+	}
 
 	tx_info = IEEE80211_SKB_CB(skb);
 	memset(tx_info, 0, sizeof(*tx_info));
@@ -174,20 +172,19 @@ static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
 {
 	struct ath_softc *sc = file->private_data;
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-	char buf[32];
 	bool start;
-	ssize_t len;
+	ssize_t ret;
 	int r;
 
+	if (count < 1)
+		return -EINVAL;
+
 	if (sc->cur_chan->nvifs > 1)
 		return -EOPNOTSUPP;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-
-	if (strtobool(buf, &start))
-		return -EINVAL;
+	ret = kstrtobool_from_user(user_buf, count, &start);
+	if (ret)
+		return ret;
 
 	mutex_lock(&sc->mutex);
 
@@ -273,10 +270,10 @@ void ath9k_tx99_init_debug(struct ath_softc *sc)
 	if (!AR_SREV_9280_20_OR_LATER(sc->sc_ah))
 		return;
 
-	debugfs_create_file("tx99", S_IRUSR | S_IWUSR,
+	debugfs_create_file("tx99", 0600,
 			    sc->debug.debugfs_phy, sc,
 			    &fops_tx99);
-	debugfs_create_file("tx99_power", S_IRUSR | S_IWUSR,
+	debugfs_create_file("tx99_power", 0600,
 			    sc->debug.debugfs_phy, sc,
 			    &fops_tx99_power);
 }