linux-kernel - [PATCH 3/4] [media] cpia2: Delete unnecessary null pointer checks in free

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Date:   Sun, 17 Sep 2017 15:34:22 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Shyam Saini <mayhs11saini@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 3/4] [media] cpia2: Delete unnecessary null pointer checks in
 free_sbufs()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 17 Sep 2017 13:23:47 +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/media/usb/cpia2/cpia2_usb.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/media/usb/cpia2/cpia2_usb.c b/drivers/media/usb/cpia2/cpia2_usb.c
index 161c9b827f8e..d1750fa48aa8 100644
--- a/drivers/media/usb/cpia2/cpia2_usb.c
+++ b/drivers/media/usb/cpia2/cpia2_usb.c
@@ -519,15 +519,11 @@ static void free_sbufs(struct camera_data *cam)
 	int i;
 
 	for (i = 0; i < NUM_SBUF; i++) {
-		if(cam->sbuf[i].urb) {
-			usb_kill_urb(cam->sbuf[i].urb);
-			usb_free_urb(cam->sbuf[i].urb);
-			cam->sbuf[i].urb = NULL;
-		}
-		if(cam->sbuf[i].data) {
-			kfree(cam->sbuf[i].data);
-			cam->sbuf[i].data = NULL;
-		}
+		usb_kill_urb(cam->sbuf[i].urb);
+		usb_free_urb(cam->sbuf[i].urb);
+		cam->sbuf[i].urb = NULL;
+		kfree(cam->sbuf[i].data);
+		cam->sbuf[i].data = NULL;
 	}
 }
 
-- 
2.14.1