linux-kernel - [PATCH 4/4] GPU-DRM-QXL: Adjust checks for null pointers in three functions

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Message-ID: <0b282ff2-cafe-0b51-912f-def4d840c4ef@users.sourceforge.net>
Date:   Thu, 22 Sep 2016 08:23:54 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     dri-devel@...ts.freedesktop.org,
        Bhaktipriya Shridhar <bhaktipriya96@...il.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Noralf Trønnes <noralf@...nnes.org>,
        Tejun Heo <tj@...nel.org>, Thierry Reding <treding@...dia.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 4/4] GPU-DRM-QXL: Adjust checks for null pointers in three
 functions

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 22 Sep 2016 08:00:08 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The script "checkpatch.pl" can point 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/gpu/drm/qxl/qxl_kms.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
index f8f0261..f594430 100644
--- a/drivers/gpu/drm/qxl/qxl_kms.c
+++ b/drivers/gpu/drm/qxl/qxl_kms.c
@@ -149,7 +149,7 @@ static int qxl_device_init(struct qxl_device *qdev,
 			io_mapping_create_wc(qdev->surfaceram_base,
 					     qdev->surfaceram_size);
 	}
-	if (qdev->surface_mapping == NULL) {
+	if (!qdev->surface_mapping) {
 		/* 64bit surface bar not present (or mapping failed) */
 		sb = 1;
 		qdev->surfaceram_base = pci_resource_start(pdev, sb);
@@ -288,7 +288,7 @@ int qxl_driver_unload(struct drm_device *dev)
 {
 	struct qxl_device *qdev = dev->dev_private;
 
-	if (qdev == NULL)
+	if (!qdev)
 		return 0;
 
 	drm_vblank_cleanup(dev);
@@ -307,7 +307,7 @@ int qxl_driver_load(struct drm_device *dev, unsigned long flags)
 	int r;
 
 	qdev = kzalloc(sizeof(*qdev), GFP_KERNEL);
-	if (qdev == NULL)
+	if (!qdev)
 		return -ENOMEM;
 
 	dev->dev_private = qdev;
-- 
2.10.0