Re: [PATCH net v4] xfrm: propagate -EINPROGRESS from validate_xmit_xfrm()

+/* Returns the skb on success, NULL if dropped, or ERR_PTR(-EINPROGRESS)
+ * if stolen by async xfrm crypto (delivered via xfrm_dev_resume()).
+ */
 static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device *dev, bool *again)
 {
 	netdev_features_t features;

@@ -4078,7 +4081,6 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again)
 {
 	struct sk_buff *next, *head = NULL, *tail;
-

 	for (; skb != NULL; skb = next) {
 		next = skb->next;
 		skb_mark_not_on_list(skb);

@@ -4087,7 +4089,7 @@ struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *d
 		skb->prev = skb;
 
 		skb = validate_xmit_skb(skb, dev, again);
-		if (!skb)
+		if (IS_ERR_OR_NULL(skb))
 			continue;
 
 		if (!head)

diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index 550457e4c..bb0c0fafa 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c

@@ -182,7 +182,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
 		err = x->type_offload->xmit(x, skb, esp_features);
 		if (err) {
 			if (err == -EINPROGRESS)
-				return NULL;
+				return ERR_PTR(-EINPROGRESS);
 
 			XFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR);
 			kfree_skb(skb);