mac80211: add brcmfmac patch fixing user space picked MACs

package/kernel/mac80211/patches/863-brcmfmac-set-wiphy-s-addresses-to-provide-valid-MACs.patch

+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
+Date: Thu, 9 Jul 2015 16:53:30 +0200
+Subject: [PATCH] brcmfmac: set wiphy's addresses to provide valid MACs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Broadcom's firmware requires every BSS to use MAC address with unique
+last few bits. The amount of bits may depend on a particular firmware,
+it was verified to be 2 for BCM43602 one.
+If this condition won't be fulfilled firmware will reject such MAC:
+brcmfmac: _brcmf_set_mac_address: Setting cur_etheraddr failed, -52
+
+We don't want to simply set addr_mask as it would also disallow using
+locally administrated bit. Instead let's build a list of addresses
+manually enabling 0x2 bit for extra interfaces.
+
+Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
+---
+
+--- a/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
++++ b/drivers/net/wireless/brcm80211/brcmfmac/cfg80211.c
+@@ -5812,6 +5812,7 @@ static void brcmf_wiphy_wowl_params(struct wiphy *wiphy)
+ 
+ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
+ {
++	struct brcmf_pub *drvr = ifp->drvr;
+ 	struct ieee80211_supported_band *band;
+ 	__le32 bandlist[3];
+ 	u32 n_bands;
+@@ -5825,6 +5826,19 @@ static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
+ 	if (err)
+ 		return err;
+ 
++	for (i = 0; i < wiphy->iface_combinations->max_interfaces &&
++	     i < ARRAY_SIZE(drvr->addresses); i++) {
++		u8 *addr = drvr->addresses[i].addr;
++
++		memcpy(addr, drvr->mac, ETH_ALEN);
++		if (i) {
++			addr[0] |= BIT(1);
++			addr[ETH_ALEN - 1] ^= i;
++		}
++	}
++	wiphy->addresses = drvr->addresses;
++	wiphy->n_addresses = i;
++
+ 	wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
+ 	wiphy->cipher_suites = __wl_cipher_suites;
+ 	wiphy->n_cipher_suites = ARRAY_SIZE(__wl_cipher_suites);
+--- a/drivers/net/wireless/brcm80211/brcmfmac/core.h
++++ b/drivers/net/wireless/brcm80211/brcmfmac/core.h
+@@ -21,6 +21,7 @@
+ #ifndef BRCMFMAC_CORE_H
+ #define BRCMFMAC_CORE_H
+ 
++#include <net/cfg80211.h>
+ #include "fweh.h"
+ 
+ #define TOE_TX_CSUM_OL		0x00000001
+@@ -118,6 +119,8 @@ struct brcmf_pub {
+ 	/* Multicast data packets sent to dongle */
+ 	unsigned long tx_multicast;
+ 
++	struct mac_address addresses[BRCMF_MAX_IFS];
++
+ 	struct brcmf_if *iflist[BRCMF_MAX_IFS];
+ 
+ 	struct mutex proto_block;