linux-kernel - [PATCH 2/2] drm/msm/mdp4: Return directly after a failed kzalloc() in mdp4_kms

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Date:   Wed, 7 Feb 2018 22:46:41 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Jyri Sarha <jsarha@...com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sushmita Susheelendra <ssusheel@...eaurora.org>,
        Rob Clark <robdclark@...il.com>, Rob Herring <robh@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 2/2] drm/msm/mdp4: Return directly after a failed kzalloc() in
 mdp4_kms_init()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 7 Feb 2018 22:34:45 +0100

* Return directly after a call of the function "kzalloc" failed
  at the beginning.

* Delete an initialisation and a check (for the local variable "kms")
  which became unnecessary with this refactoring.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
index 5c5965a9d1f9..4f15cd569ee1 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c
@@ -411,15 +411,13 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 	struct platform_device *pdev = to_platform_device(dev->dev);
 	struct mdp4_platform_config *config = mdp4_get_config(pdev);
 	struct mdp4_kms *mdp4_kms;
-	struct msm_kms *kms = NULL;
+	struct msm_kms *kms;
 	struct msm_gem_address_space *aspace;
 	int irq, ret;
 
 	mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
-	if (!mdp4_kms) {
-		ret = -ENOMEM;
-		goto fail;
-	}
+	if (!mdp4_kms)
+		return ERR_PTR(-ENOMEM);
 
 	mdp_kms_init(&mdp4_kms->base, &kms_funcs);
 
@@ -550,8 +548,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
 	return kms;
 
 fail:
-	if (kms)
-		mdp4_destroy(kms);
+	mdp4_destroy(kms);
 	return ERR_PTR(ret);
 }
 
-- 
2.16.1