linux-kernel - [PATCH v2 06/17] IB/mlx4: Delete an unnecessary check before kfree() in free_pv

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Message-ID: <950a4a7f-01f6-9791-5d4c-41abe07366ed@users.sourceforge.net>
Date:   Fri, 21 Apr 2017 20:36:05 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Doug Ledford <dledford@...hat.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        Majd Dibbiny <majd@...lanox.com>,
        Matan Barak <matanb@...lanox.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Yishai Hadas <yishaih@...lanox.com>, linux-rdma@...r.kernel.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH v2 06/17] IB/mlx4: Delete an unnecessary check before kfree()
 in free_pv_object()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 21 Apr 2017 13:50:38 +0200

The script "checkpatch.pl" pointed information out like the following.

WARNING: kfree(NULL) is safe and this check is probably not required

Thus fix the affected source code place.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/infiniband/hw/mlx4/mad.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/mlx4/mad.c b/drivers/infiniband/hw/mlx4/mad.c
index cf33efce69d2..3caf468ca133 100644
--- a/drivers/infiniband/hw/mlx4/mad.c
+++ b/drivers/infiniband/hw/mlx4/mad.c
@@ -1962,10 +1962,8 @@ static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
 
 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
 {
-	if (dev->sriov.demux[port - 1].tun[slave]) {
-		kfree(dev->sriov.demux[port - 1].tun[slave]);
-		dev->sriov.demux[port - 1].tun[slave] = NULL;
-	}
+	kfree(dev->sriov.demux[port - 1].tun[slave]);
+	dev->sriov.demux[port - 1].tun[slave] = NULL;
 }
 
 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
-- 
2.12.2