3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steve Wise <redacted>

commit 14b9222808bb8bfefc71f72bc0dbdcf3b2f0140f upstream.

Log a warning and drop the abort message.  Otherwise we will do a
bogus wake_up() and crash.

Signed-off-by: Steve Wise <redacted>
Signed-off-by: Roland Dreier <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/hw/cxgb4/cm.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c

@@ -2656,6 +2656,12 @@ static int peer_abort_intr(struct c4iw_d
 	unsigned int tid = GET_TID(req);
 
 	ep = lookup_tid(t, tid);
+	if (!ep) {
+		printk(KERN_WARNING MOD
+		       "Abort on non-existent endpoint, tid %d\n", tid);
+		kfree_skb(skb);
+		return 0;
+	}
 	if (is_neg_adv_abort(req->status)) {
 		PDBG("%s neg_adv_abort ep %p tid %u\n", __func__, ep,
 		     ep->hwtid);