rtw88: enclose c2h cmd handle with mutex

C2H commands that cannot be handled in IRQ context should
be protected by rtwdev->mutex. Because they might have a
sequece of hardware operations that does not want to be
interfered.
Signed-off-by: NYan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/fw.c

@@ -36,6 +36,8 @@ void rtw_fw_c2h_cmd_handle(struct rtw_dev *rtwdev, struct sk_buff *skb)
 	c2h = (struct rtw_c2h_cmd *)(skb->data + pkt_offset);
 	len = skb->len - pkt_offset - 2;
 
+	mutex_lock(&rtwdev->mutex);
+
 	switch (c2h->id) {
 	case C2H_HALMAC:
 		rtw_fw_c2h_cmd_handle_ext(rtwdev, skb);
@@ -43,6 +45,8 @@ void rtw_fw_c2h_cmd_handle(struct rtw_dev *rtwdev, struct sk_buff *skb)
 	default:
 		break;
 	}
+
+	mutex_unlock(&rtwdev->mutex);
 }
 
 void rtw_fw_c2h_cmd_rx_irqsafe(struct rtw_dev *rtwdev, u32 pkt_offset,