From: Zhao Hongjiang <zhaohongjiang@huawei.com>
Date: Tue, 5 Nov 2013 05:54:55 +0000 (+1100)
Subject: drivers/infiniband/core/cm.c: convert to using idr_alloc_cyclic()
X-Git-Tag: next-20131105~2^2~322
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=70a728e40e30dff0503afdf238e88a32039966e0;p=karo-tx-linux.git

drivers/infiniband/core/cm.c: convert to using idr_alloc_cyclic()

commit 3e6628c4b347 ("idr: introduce idr_alloc_cyclic()") adds a new
idr_alloc_cyclic routine and converts several of these users to it.  This
is just a missed one - add it.

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 784b97cb05b0..f2ef7ef0f36f 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -383,14 +383,11 @@ static int cm_alloc_id(struct cm_id_private *cm_id_priv)
 {
 	unsigned long flags;
 	int id;
-	static int next_id;
 
 	idr_preload(GFP_KERNEL);
 	spin_lock_irqsave(&cm.lock, flags);
 
-	id = idr_alloc(&cm.local_id_table, cm_id_priv, next_id, 0, GFP_NOWAIT);
-	if (id >= 0)
-		next_id = max(id + 1, 0);
+	id = idr_alloc_cyclic(&cm.local_id_table, cm_id_priv, 0, 0, GFP_NOWAIT);
 
 	spin_unlock_irqrestore(&cm.lock, flags);
 	idr_preload_end();