drivers/infiniband/hw/amso1100: convert to using idr_alloc_cyclic

Signed-off-by: NJeff Layton <jlayton@redhat.com>
Reviewed-by: NTejun Heo <tj@kernel.org>
Cc: Steve Wise <swise@opengridcomputing.com>
Cc: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/infiniband/hw/amso1100/c2.h

@@ -265,7 +265,6 @@ struct c2_pd_table {
 struct c2_qp_table {
 	struct idr idr;
 	spinlock_t lock;
-	int last;
 };
 
 struct c2_element {

drivers/infiniband/hw/amso1100/c2_qp.c

@@ -385,8 +385,7 @@ static int c2_alloc_qpn(struct c2_dev *c2dev, struct c2_qp *qp)
 	idr_preload(GFP_KERNEL);
 	spin_lock_irq(&c2dev->qp_table.lock);
 
-	ret = idr_alloc(&c2dev->qp_table.idr, qp, c2dev->qp_table.last++, 0,
-			GFP_NOWAIT);
+	ret = idr_alloc_cyclic(&c2dev->qp_table.idr, qp, 0, 0, GFP_NOWAIT);
 	if (ret >= 0)
 		qp->qpn = ret;