RDMA/rxe: Replace __rxe_do_task by rxe_run_task

In rxe_req.c replace calls to __rxe_do_task() by calls to rxe_run_task(..,
0). Using __rxe_do_task is an error because the completer tasklet is not
designed to be re-entrant and __rxe_do_task() should only be called when
it is clear that no one else could be calling the completer tasklet as is
the case in rxe_qp.c where this call is used in safe environments.

Link: https://lore.kernel.org/r/20220630190425.2251-10-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_req.c

@@ -722,7 +722,7 @@ int rxe_requester(void *arg)
 						       qp->req.wqe_index);
 			wqe->state = wqe_state_done;
 			wqe->status = IB_WC_SUCCESS;
-			__rxe_do_task(&qp->comp.task);
+			rxe_run_task(&qp->comp.task, 0);
 			goto done;
 		}
 		payload = mtu;
@@ -803,7 +803,7 @@ int rxe_requester(void *arg)
 	goto out;
 err:
 	wqe->state = wqe_state_error;
-	__rxe_do_task(&qp->comp.task);
+	rxe_run_task(&qp->comp.task, 0);
 exit:
 	ret = -EAGAIN;
 out: