[IB] Have cq_resize() method take an int, not int*

Change the struct ib_device.resize_cq() method to take a plain integer
that holds the new CQ size, rather than a pointer to an integer that
it uses to return the new size.  This makes the interface match the
exported ib_resize_cq() signature, and allows the low-level driver to
update the CQ size with proper locking if necessary.

No in-tree drivers are exporting this method yet.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/core/verbs.c

@@ -324,16 +324,8 @@ EXPORT_SYMBOL(ib_destroy_cq);
 int ib_resize_cq(struct ib_cq *cq,
                  int           cqe)
 {
-	int ret;
-
-	if (!cq->device->resize_cq)
-		return -ENOSYS;
-
-	ret = cq->device->resize_cq(cq, &cqe);
-	if (!ret)
-		cq->cqe = cqe;
-
-	return ret;
+	return cq->device->resize_cq ?
+		cq->device->resize_cq(cq, cqe) : -ENOSYS;
 }
 EXPORT_SYMBOL(ib_resize_cq);
 

include/rdma/ib_verbs.h

@@ -881,7 +881,7 @@ struct ib_device {
 						struct ib_ucontext *context,
 						struct ib_udata *udata);
 	int                        (*destroy_cq)(struct ib_cq *cq);
-	int                        (*resize_cq)(struct ib_cq *cq, int *cqe);
+	int                        (*resize_cq)(struct ib_cq *cq, int cqe);
 	int                        (*poll_cq)(struct ib_cq *cq, int num_entries,
 					      struct ib_wc *wc);
 	int                        (*peek_cq)(struct ib_cq *cq, int wc_cnt);