brcmsmac: allow user-space setting of interface address

The interface address of the wireless device is determined by
the permanent address stored in the device. This patch allows
it to be overridden from user-space.

Reported-by: Maximilian Engelhardt <maxi@daemonizer.de>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c

@@ -363,6 +363,7 @@ brcms_ops_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 	}
 
 	spin_lock_bh(&wl->lock);
+	memcpy(wl->pub->cur_etheraddr, vif->addr, sizeof(vif->addr));
 	wl->mute_tx = false;
 	brcms_c_mute(wl->wlc, false);
 	spin_unlock_bh(&wl->lock);

drivers/net/wireless/brcm80211/brcmsmac/main.c

@@ -2473,6 +2473,7 @@ static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw,
 static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool mute_tx)
 {
 	static const u8 null_ether_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
+	u8 *ethaddr = wlc_hw->wlc->pub->cur_etheraddr;
 
 	if (mute_tx) {
 		/* suspend tx fifos */
@@ -2482,8 +2483,7 @@ static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool mute_tx)
 		brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_VI_FIFO);
 
 		/* zero the address match register so we do not send ACKs */
-		brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
-				       null_ether_addr);
+		brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET, null_ether_addr);
 	} else {
 		/* resume tx fifos */
 		brcms_b_tx_fifo_resume(wlc_hw, TX_DATA_FIFO);
@@ -2492,8 +2492,7 @@ static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool mute_tx)
 		brcms_b_tx_fifo_resume(wlc_hw, TX_AC_VI_FIFO);
 
 		/* Restore address */
-		brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
-				       wlc_hw->etheraddr);
+		brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET, ethaddr);
 	}
 
 	wlc_phy_mute_upd(wlc_hw->band->pi, mute_tx, 0);