brcmfmac: Fix p2p setup when connected to ap on 5G.

The firmware requires that on p2p setup when net interfaces
are created or updated that they start initially with the same
channel as the channel in use for the current connection
(if any). If none exists take default channel 11.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmfmac/p2p.c

@@ -47,6 +47,7 @@
 #define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
 					 (channel == SOCIAL_CHAN_2) || \
 					 (channel == SOCIAL_CHAN_3))
+#define BRCMF_P2P_TEMP_CHAN	SOCIAL_CHAN_3
 #define SOCIAL_CHAN_CNT		3
 #define AF_PEER_SEARCH_CNT	2
 
@@ -2013,17 +2014,30 @@ static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
 					   u16 *chanspec)
 {
 	struct brcmf_if *ifp;
-	struct brcmf_fil_chan_info_le ci;
+	u8 mac_addr[ETH_ALEN];
 	struct brcmu_chan ch;
-	s32 err;
+	struct brcmf_bss_info_le *bi;
+	u8 *buf;
 
 	ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
 
-	ch.chnum = 11;
-
-	err = brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_CHANNEL, &ci, sizeof(ci));
-	if (!err)
-		ch.chnum = le32_to_cpu(ci.hw_channel);
+	if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
+				   ETH_ALEN) == 0) {
+		buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
+		if (buf != NULL) {
+			*(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
+			if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
+						   buf, WL_BSS_INFO_MAX) == 0) {
+				bi = (struct brcmf_bss_info_le *)(buf + 4);
+				*chanspec = le16_to_cpu(bi->chanspec);
+				kfree(buf);
+				return;
+			}
+			kfree(buf);
+		}
+	}
+	/* Use default channel for P2P */
+	ch.chnum = BRCMF_P2P_TEMP_CHAN;
 	ch.bw = BRCMU_CHAN_BW_20;
 	p2p->cfg->d11inf.encchspec(&ch);
 	*chanspec = ch.chspec;