RDMA/irdma: Use list_last_entry/list_first_entry

Use list_last_entry and list_first_entry instead of using prev and next
pointers.

Link: https://lore.kernel.org/r/20210608211415.680-1-shiraz.saleem@intel.comReported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/irdma/puda.c

@@ -1419,7 +1419,7 @@ irdma_ieq_handle_partial(struct irdma_puda_rsrc *ieq, struct irdma_pfpdu *pfpdu,
 
 error:
 	while (!list_empty(&pbufl)) {
-		buf = (struct irdma_puda_buf *)(pbufl.prev);
+		buf = list_last_entry(&pbufl, struct irdma_puda_buf, list);
 		list_move(&buf->list, rxlist);
 	}
 	if (txbuf)

drivers/infiniband/hw/irdma/utils.c

@@ -425,8 +425,8 @@ struct irdma_cqp_request *irdma_alloc_and_get_cqp_request(struct irdma_cqp *cqp,
 
 	spin_lock_irqsave(&cqp->req_lock, flags);
 	if (!list_empty(&cqp->cqp_avail_reqs)) {
-		cqp_request = list_entry(cqp->cqp_avail_reqs.next,
-					 struct irdma_cqp_request, list);
+		cqp_request = list_first_entry(&cqp->cqp_avail_reqs,
+					       struct irdma_cqp_request, list);
 		list_del_init(&cqp_request->list);
 	}
 	spin_unlock_irqrestore(&cqp->req_lock, flags);