+enum {
+ NUM_FAKE_CPLS = 1,
+ FAKE_CPL_PUT_EP_SAFE = NUM_CPL_CMDS + 0,
+};
+
+static int _put_ep_safe(struct c4iw_dev *dev, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep;
+
+ ep = *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *)));
+ release_ep_resources(ep);
+ return 0;
+}
+
+/*
+ * Fake up a special CPL opcode and call sched() so process_work() will call
+ * _put_ep_safe() in a safe context to free the ep resources. This is needed
+ * because ARP error handlers are called in an ATOMIC context, and
+ * _c4iw_free_ep() needs to block.
+ */
+static void queue_arp_failure_cpl(struct c4iw_ep *ep, struct sk_buff *skb)
+{
+ struct cpl_act_establish *rpl = cplhdr(skb);
+
+ /* Set our special ARP_FAILURE opcode */
+ rpl->ot.opcode = FAKE_CPL_PUT_EP_SAFE;
+
+ /*
+ * Save ep in the skb->cb area, after where sched() will save the dev
+ * ptr.
+ */
+ *((struct c4iw_ep **)(skb->cb + 2 * sizeof(void *))) = ep;
+ sched(ep->com.dev, skb);
+}
+
+/* Handle an ARP failure for an accept */
+static void pass_accept_rpl_arp_failure(void *handle, struct sk_buff *skb)
+{
+ struct c4iw_ep *ep = handle;
+
+ pr_err(MOD "ARP failure during accept - tid %u -dropping connection\n",
+ ep->hwtid);
+
+ __state_set(&ep->com, DEAD);
+ queue_arp_failure_cpl(ep, skb);
+}
+