diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index 81107100e36827ab8b46863fb35079af105a821b..5190cc859e44c66cf06c5de0e1a8d30fd59a8adb 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -509,6 +509,7 @@ struct ath9k_htc_priv {
 	unsigned long ps_usecount;
 	bool ps_enabled;
 	bool ps_idle;
+	bool initialized;
 
 #ifdef CONFIG_MAC80211_LEDS
 	enum led_brightness brightness;
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index e3a6f48dbd8cf8afee73ca7ff4f4cee1c6134707..590ba96c855dbad18d3fe6a4a5ad5780a1fb5b9d 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -967,6 +967,10 @@ int ath9k_htc_probe_device(struct htc_target *htc_handle, struct device *dev,
 
 	htc_handle->drv_priv = priv;
 
+	/* Allow ath9k_wmi_event_tasklet() to operate. */
+	smp_wmb();
+	priv->initialized = true;
+
 	return 0;
 
 err_init:
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
index d128fca530e69808b675e46fa6d31cd6f4a55d55..2bca38e39721c38a5cc07f2ff19cb5a0b7cfe9b3 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
@@ -809,6 +809,7 @@ int ath9k_tx_init(struct ath9k_htc_priv *priv)
 	skb_queue_head_init(&priv->tx.data_vi_queue);
 	skb_queue_head_init(&priv->tx.data_vo_queue);
 	skb_queue_head_init(&priv->tx.tx_failed);
+
 	return 0;
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
index cdc146091194828af19d3ba984b56e3928ced896..38341bd2fd124872128e2a4ad14d68887009e0fd 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.c
+++ b/drivers/net/wireless/ath/ath9k/wmi.c
@@ -153,6 +153,12 @@ void ath9k_wmi_event_tasklet(unsigned long data)
 		}
 		spin_unlock_irqrestore(&wmi->wmi_lock, flags);
 
+		/* Check if ath9k_htc_probe_device() completed. */
+		if (!data_race(priv->initialized)) {
+			kfree_skb(skb);
+			continue;
+		}
+
 		hdr = (struct wmi_cmd_hdr *) skb->data;
 		cmd_id = be16_to_cpu(hdr->command_id);
 		wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));