P2P: Prefer 5 GHz channels for initial pick

If there are no other preferences from local configuration or driver,
prefer a random 5 GHz channel instead of falling back to the fixed
pre-configured channel (which is selected by default to be 1, 6, or 11).

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/p2p/p2p.c

@@ -1180,6 +1180,7 @@ static int p2p_prepare_channel_pref(struct p2p_data *p2p,
 static void p2p_prepare_channel_best(struct p2p_data *p2p)
 {
 	u8 op_class, op_channel;
+	const int op_classes_5ghz[] = { 115, 124, 0 };
 
 	p2p_dbg(p2p, "Prepare channel best");
 
@@ -1211,6 +1212,11 @@ static void p2p_prepare_channel_best(struct p2p_data *p2p)
 		p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
 		p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
 		p2p->op_channel = p2p->cfg->pref_chan[0].chan;
+	} else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
+				      &p2p->op_reg_class, &p2p->op_channel) ==
+		   0) {
+		p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
+			p2p->op_reg_class, p2p->op_channel);
 	} else {
 		p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
 		p2p->op_reg_class = p2p->cfg->op_reg_class;