linux-kernel - [PATCH] s390/ctcm: Delete unnecessary checks before the macro call “dev_kfree

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Date:   Thu, 22 Aug 2019 11:04:43 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     linux-s390@...r.kernel.org,
        Christian Bornträger <borntraeger@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Julian Wiedmann <jwi@...ux.ibm.com>,
        Ursula Braun <ubraun@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] s390/ctcm: Delete unnecessary checks before the macro call “dev_kfree_skb”

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 22 Aug 2019 10:55:33 +0200

The dev_kfree_skb() function performs also input parameter validation.
Thus the test around the shown calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/s390/net/ctcm_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
index f63c5c871d3d..90025d1923d2 100644
--- a/drivers/s390/net/ctcm_main.c
+++ b/drivers/s390/net/ctcm_main.c
@@ -1074,10 +1074,8 @@ static void ctcm_free_netdevice(struct net_device *dev)
 		if (grp) {
 			if (grp->fsm)
 				kfree_fsm(grp->fsm);
-			if (grp->xid_skb)
-				dev_kfree_skb(grp->xid_skb);
-			if (grp->rcvd_xid_skb)
-				dev_kfree_skb(grp->rcvd_xid_skb);
+			dev_kfree_skb(grp->xid_skb);
+			dev_kfree_skb(grp->rcvd_xid_skb);
 			tasklet_kill(&grp->mpc_tasklet2);
 			kfree(grp);
 			priv->mpcg = NULL;
--
2.23.0