net/smc: Remove a WARN_ON() statement

Remove a WARN_ON() statement that verifies something that is guaranteed
by the RDMA API, namely that the failed_wr pointer is not touched if an
ib_post_send() call succeeds and that it points at the failed wr if an
ib_post_send() call fails.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Acked-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

net/smc/smc_wr.c

@@ -274,7 +274,6 @@ int smc_wr_reg_send(struct smc_link *link, struct ib_mr *mr)
 	link->wr_reg.key = mr->rkey;
 	failed_wr = &link->wr_reg.wr;
 	rc = ib_post_send(link->roce_qp, &link->wr_reg.wr, &failed_wr);
-	WARN_ON(failed_wr != &link->wr_reg.wr);
 	if (rc)
 		return rc;