linux-kernel - [PATCH] [media] tw686x: Delete an unnecessary check before the function call "video_unregister

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Date:	Tue, 19 Jul 2016 21:35:34 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-media@...r.kernel.org,
	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] [media] tw686x: Delete an unnecessary check before the
 function call "video_unregister_device"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 19 Jul 2016 21:24:26 +0200

The video_unregister_device() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/pci/tw686x/tw686x-video.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c
index cdb16de..4475a9d9 100644
--- a/drivers/media/pci/tw686x/tw686x-video.c
+++ b/drivers/media/pci/tw686x/tw686x-video.c
@@ -1093,8 +1093,7 @@ void tw686x_video_free(struct tw686x_dev *dev)
 	for (ch = 0; ch < max_channels(dev); ch++) {
 		struct tw686x_video_channel *vc = &dev->video_channels[ch];
 
-		if (vc->device)
-			video_unregister_device(vc->device);
+		video_unregister_device(vc->device);
 
 		if (dev->dma_ops->free)
 			for (pb = 0; pb < 2; pb++)
-- 
2.9.2