staging: brcm80211: remove filtering of received frames

In the receive path of the brcmsmac driver probe request frames and
frames with invalid mac address fields are dropped. This is only
fine for STA mode. Anticipating coming AP and monitor mode functionality
this is unwanted behavior.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/brcm80211/brcmsmac/main.c

@@ -8238,29 +8238,8 @@ void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p)
 	if (len < D11_PHY_HDR_LEN + sizeof(h->frame_control))
 		goto toss;
 
+	/* not supporting A-MSDU */
 	is_amsdu = rxh->RxStatus2 & RXS_AMSDU_MASK;
-
-	/* explicitly test bad src address to avoid sending bad deauth */
-	if (!is_amsdu) {
-		/* CTS and ACK CTL frames are w/o a2 */
-
-		if (ieee80211_is_data(h->frame_control) ||
-		    ieee80211_is_mgmt(h->frame_control)) {
-			if ((is_zero_ether_addr(h->addr2) ||
-			     is_multicast_ether_addr(h->addr2))) {
-				wiphy_err(wlc->wiphy, "wl%d: %s: dropping a "
-					  "frame with invalid src mac address,"
-					  " a2: %pM\n",
-					 wlc->pub->unit, __func__, h->addr2);
-				goto toss;
-			}
-		}
-	}
-
-	/* due to sheer numbers, toss out probe reqs for now */
-	if (ieee80211_is_probe_req(h->frame_control))
-		goto toss;
-
 	if (is_amsdu)
 		goto toss;