linux-kernel - [PATCH 6/6] [media] atmel-isi: Adjust a null pointer check in three functions

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Date:   Mon, 4 Sep 2017 22:12:38 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-media@...r.kernel.org,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Songjun Wu <songjun.wu@...rochip.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 6/6] [media] atmel-isi: Adjust a null pointer check in three
 functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 4 Sep 2017 21:30:48 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/media/platform/atmel/atmel-isi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c
index ac40defce1e7..f2e13dfb19a1 100644
--- a/drivers/media/platform/atmel/atmel-isi.c
+++ b/drivers/media/platform/atmel/atmel-isi.c
@@ -411,7 +411,7 @@ static void buffer_queue(struct vb2_buffer *vb)
 	spin_lock_irqsave(&isi->irqlock, flags);
 	list_add_tail(&buf->list, &isi->video_buffer_list);
 
-	if (isi->active == NULL) {
+	if (!isi->active) {
 		isi->active = buf;
 		if (vb2_is_streaming(vb->vb2_queue))
 			start_dma(isi, buf);
@@ -1141,7 +1141,7 @@ static int isi_graph_init(struct atmel_isi *isi)
 
 	/* Register the subdevices notifier. */
 	subdevs = devm_kzalloc(isi->dev, sizeof(*subdevs), GFP_KERNEL);
-	if (subdevs == NULL) {
+	if (!subdevs) {
 		of_node_put(isi->entity.node);
 		return -ENOMEM;
 	}
@@ -1200,7 +1200,7 @@ static int atmel_isi_probe(struct platform_device *pdev)
 		return ret;
 
 	isi->vdev = video_device_alloc();
-	if (isi->vdev == NULL) {
+	if (!isi->vdev) {
 		ret = -ENOMEM;
 		goto err_vdev_alloc;
 	}
-- 
2.14.1