static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr;
	enum ath9k_pkt_type htype;
	__le16 fc;

	hdr = (struct ieee80211_hdr *)skb->data;
	fc = hdr->frame_control;

	if (ieee80211_is_beacon(fc))
		htype = ATH9K_PKT_TYPE_BEACON;
	else if (ieee80211_is_probe_resp(fc))
		htype = ATH9K_PKT_TYPE_PROBE_RESP;
	else if (ieee80211_is_atim(fc))
		htype = ATH9K_PKT_TYPE_ATIM;
	else if (ieee80211_is_pspoll(fc))
		htype = ATH9K_PKT_TYPE_PSPOLL;
	else
		htype = ATH9K_PKT_TYPE_NORMAL;

	return htype;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.