diff --git a/src/p2p/p2p_go_neg.c b/src/p2p/p2p_go_neg.c
index bd583be..eea946f 100644
--- a/src/p2p/p2p_go_neg.c
+++ b/src/p2p/p2p_go_neg.c
@@ -471,9 +471,11 @@
 				 u8 *status)
 {
 	struct p2p_channels intersection;
-	size_t i;
 
+	p2p_channels_dump(p2p, "own channels", &p2p->channels);
+	p2p_channels_dump(p2p, "peer channels", &dev->channels);
 	p2p_channels_intersect(&p2p->channels, &dev->channels, &intersection);
+	p2p_channels_dump(p2p, "intersection", &intersection);
 	if (intersection.reg_classes == 0 ||
 	    intersection.reg_class[0].channels == 0) {
 		*status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
@@ -481,14 +483,6 @@
 		return -1;
 	}
 
-	for (i = 0; i < intersection.reg_classes; i++) {
-		struct p2p_reg_class *c;
-		c = &intersection.reg_class[i];
-		p2p_dbg(p2p, "reg_class %u", c->reg_class);
-		wpa_hexdump(MSG_DEBUG, "P2P: channels",
-			    c->channel, c->channels);
-	}
-
 	if (!p2p_channels_includes(&intersection, p2p->op_reg_class,
 				   p2p->op_channel)) {
 		if (dev->flags & P2P_DEV_FORCE_FREQ) {
diff --git a/src/p2p/p2p_i.h b/src/p2p/p2p_i.h
index f323ef7..f9b1e68 100644
--- a/src/p2p/p2p_i.h
+++ b/src/p2p/p2p_i.h
@@ -580,6 +580,8 @@
 			    struct p2p_channels *res);
 int p2p_channels_includes(const struct p2p_channels *channels, u8 reg_class,
 			  u8 channel);
+void p2p_channels_dump(struct p2p_data *p2p, const char *title,
+		       const struct p2p_channels *chan);
 #ifdef ANDROID_P2P
 size_t p2p_copy_reg_class(struct p2p_reg_class *dc, struct p2p_reg_class *sc);
 #endif
diff --git a/src/p2p/p2p_utils.c b/src/p2p/p2p_utils.c
index a4c48f6..8c2d2de 100644
--- a/src/p2p/p2p_utils.c
+++ b/src/p2p/p2p_utils.c
@@ -310,3 +310,36 @@
 
 	return 0;
 }
+
+
+void p2p_channels_dump(struct p2p_data *p2p, const char *title,
+		       const struct p2p_channels *chan)
+{
+	char buf[500], *pos, *end;
+	size_t i, j;
+	int ret;
+
+	pos = buf;
+	end = pos + sizeof(buf);
+
+	for (i = 0; i < chan->reg_classes; i++) {
+		const struct p2p_reg_class *c;
+		c = &chan->reg_class[i];
+		ret = os_snprintf(pos, end - pos, " %u:", c->reg_class);
+		if (ret < 0 || ret >= end - pos)
+			break;
+		pos += ret;
+
+		for (j = 0; j < c->channels; j++) {
+			ret = os_snprintf(pos, end - pos, "%s%u",
+					  j == 0 ? "" : ",",
+					  c->channel[j]);
+			if (ret < 0 || ret >= end - pos)
+				break;
+			pos += ret;
+		}
+	}
+	*pos = '\0';
+
+	p2p_dbg(p2p, "%s:%s", title, buf);
+}