diff --git a/net/can/isotp.c b/net/can/isotp.c
index 16ebc187af1c..d34f9ab2eb62 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -228,8 +228,8 @@ static int isotp_send_fc(struct sock *sk, int ae, u8 flowstatus)
 
 	can_send_ret = can_send(nskb, 1);
 	if (can_send_ret)
-		pr_notice_once("can-isotp: %s: can_send_ret %d\n",
-			       __func__, can_send_ret);
+		pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+			       __func__, ERR_PTR(can_send_ret));
 
 	dev_put(dev);
 
@@ -814,8 +814,8 @@ isotp_tx_burst:
 
 		can_send_ret = can_send(skb, 1);
 		if (can_send_ret)
-			pr_notice_once("can-isotp: %s: can_send_ret %d\n",
-				       __func__, can_send_ret);
+			pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+				       __func__, ERR_PTR(can_send_ret));
 
 		if (so->tx.idx >= so->tx.len) {
 			/* we are done */
@@ -976,8 +976,8 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 	err = can_send(skb, 1);
 	dev_put(dev);
 	if (err) {
-		pr_notice_once("can-isotp: %s: can_send_ret %d\n",
-			       __func__, err);
+		pr_notice_once("can-isotp: %s: can_send_ret %pe\n",
+			       __func__, ERR_PTR(err));
 
 		/* no transmission -> no timeout monitoring */
 		if (hrtimer_sec)