add ax88772_rst

hc

2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29

 kernel/net/hsr/hsr_forward.c
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@@ -186,6 +186,7 @@
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 	set_prp_LSDU_size(trailer, lsdu_size);
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 	trailer->sequence_nr = htons(frame->sequence_nr);
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 	trailer->PRP_suffix = htons(ETH_P_PRP);
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+	skb->protocol = eth_hdr(skb)->h_proto;
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 	return skb;
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 }
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@@ -226,6 +227,7 @@
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 	hsr_ethhdr->hsr_tag.encap_proto = hsr_ethhdr->ethhdr.h_proto;
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 	hsr_ethhdr->ethhdr.h_proto = htons(proto_version ?
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 			ETH_P_HSR : ETH_P_PRP);
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+	skb->protocol = hsr_ethhdr->ethhdr.h_proto;
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 	return skb;
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 }
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@@ -435,7 +437,6 @@
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 {
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 	struct hsr_port *port = frame->port_rcv;
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 	struct hsr_priv *hsr = port->hsr;
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-	unsigned long irqflags;
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 	frame->skb_hsr = NULL;
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 	frame->skb_prp = NULL;
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@@ -445,17 +446,20 @@
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 		frame->is_from_san = true;
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 	} else {
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 		/* Sequence nr for the master node */
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-		spin_lock_irqsave(&hsr->seqnr_lock, irqflags);
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+		lockdep_assert_held(&hsr->seqnr_lock);
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 		frame->sequence_nr = hsr->sequence_nr;
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 		hsr->sequence_nr++;
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-		spin_unlock_irqrestore(&hsr->seqnr_lock, irqflags);
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 	}
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 }
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 int hsr_fill_frame_info(__be16 proto, struct sk_buff *skb,
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 			struct hsr_frame_info *frame)
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 {
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-	if (proto == htons(ETH_P_PRP) ||
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+	struct hsr_port *port = frame->port_rcv;
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+	struct hsr_priv *hsr = port->hsr;
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+
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+	/* HSRv0 supervisory frames double as a tag so treat them as tagged. */
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+	if ((!hsr->prot_version && proto == htons(ETH_P_PRP)) ||
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 	    proto == htons(ETH_P_HSR)) {
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 		/* Check if skb contains hsr_ethhdr */
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 		if (skb->mac_len < sizeof(struct hsr_ethhdr))
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@@ -527,6 +531,7 @@
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 		proto = vlan_hdr->vlanhdr.h_vlan_encapsulated_proto;
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 		/* FIXME: */
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 		netdev_warn_once(skb->dev, "VLAN not yet supported");
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+		return -EINVAL;
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 	}
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 	frame->is_from_san = false;
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@@ -545,11 +550,13 @@
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 {
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 	struct hsr_frame_info frame;
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+	rcu_read_lock();
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 	if (fill_frame_info(&frame, skb, port) < 0)
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 		goto out_drop;
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 	hsr_register_frame_in(frame.node_src, port, frame.sequence_nr);
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 	hsr_forward_do(&frame);
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+	rcu_read_unlock();
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 	/* Gets called for ingress frames as well as egress from master port.
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 	 * So check and increment stats for master port only here.
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 	 */
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@@ -564,6 +571,7 @@
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 	return;
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 out_drop:
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+	rcu_read_unlock();
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 	port->dev->stats.tx_dropped++;
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 	kfree_skb(skb);
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 }