linux-kernel - [PATCH v2 08/17] drm/msm: remove checks for return value of drm_debugfs_create

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Message-Id: <20200310133121.27913-9-wambui.karugax@gmail.com>
Date:   Tue, 10 Mar 2020 16:31:12 +0300
From:   Wambui Karuga <wambui.karugax@...il.com>
To:     airlied@...ux.ie, daniel@...ll.ch, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org
Subject: [PATCH v2 08/17] drm/msm: remove checks for return value of drm_debugfs_create_files()

Since commit 987d65d01356 (drm: debugfs: make
drm_debugfs_create_files() never fail), drm_debugfs_create_files never
fails and only returns 0. Therefore, the unnecessary checks for its
return value and error handling in various debugfs_init() functions in
drm/msm and have the functions return 0 directly.

v2: have debug functions return 0 instead of void to avoid build
breakage and ensure standalone compilation.

References: https://lists.freedesktop.org/archives/dri-devel/2020-February/257183.html
Signed-off-by: Wambui Karuga <wambui.karugax@...il.com>
---
 drivers/gpu/drm/msm/adreno/a5xx_debugfs.c | 12 +++---------
 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c  | 14 +++-----------
 drivers/gpu/drm/msm/msm_debugfs.c         | 13 ++++---------
 3 files changed, 10 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
index 075ecce4b5e0..011ab6353dbb 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_debugfs.c
@@ -151,21 +151,15 @@ DEFINE_SIMPLE_ATTRIBUTE(reset_fops, NULL, reset_set, "%llx\n");
 int a5xx_debugfs_init(struct msm_gpu *gpu, struct drm_minor *minor)
 {
 	struct drm_device *dev;
-	int ret;
 
 	if (!minor)
 		return 0;
 
 	dev = minor->dev;
 
-	ret = drm_debugfs_create_files(a5xx_debugfs_list,
-			ARRAY_SIZE(a5xx_debugfs_list),
-			minor->debugfs_root, minor);
-
-	if (ret) {
-		DRM_DEV_ERROR(dev->dev, "could not install a5xx_debugfs_list\n");
-		return ret;
-	}
+	drm_debugfs_create_files(a5xx_debugfs_list,
+				 ARRAY_SIZE(a5xx_debugfs_list),
+				 minor->debugfs_root, minor);
 
 	debugfs_create_file("reset", S_IWUGO, minor->debugfs_root, dev,
 			    &reset_fops);
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 6650f478b226..41b461128bbc 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -259,17 +259,9 @@ static struct drm_info_list mdp5_debugfs_list[] = {
 
 static int mdp5_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor)
 {
-	struct drm_device *dev = minor->dev;
-	int ret;
-
-	ret = drm_debugfs_create_files(mdp5_debugfs_list,
-			ARRAY_SIZE(mdp5_debugfs_list),
-			minor->debugfs_root, minor);
-
-	if (ret) {
-		DRM_DEV_ERROR(dev->dev, "could not install mdp5_debugfs_list\n");
-		return ret;
-	}
+	drm_debugfs_create_files(mdp5_debugfs_list,
+				 ARRAY_SIZE(mdp5_debugfs_list),
+				 minor->debugfs_root, minor);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c
index 1c74381a4fc9..6378157e1fff 100644
--- a/drivers/gpu/drm/msm/msm_debugfs.c
+++ b/drivers/gpu/drm/msm/msm_debugfs.c
@@ -220,14 +220,9 @@ int msm_debugfs_init(struct drm_minor *minor)
 	struct msm_drm_private *priv = dev->dev_private;
 	int ret;
 
-	ret = drm_debugfs_create_files(msm_debugfs_list,
-			ARRAY_SIZE(msm_debugfs_list),
-			minor->debugfs_root, minor);
-
-	if (ret) {
-		DRM_DEV_ERROR(dev->dev, "could not install msm_debugfs_list\n");
-		return ret;
-	}
+	drm_debugfs_create_files(msm_debugfs_list,
+				 ARRAY_SIZE(msm_debugfs_list),
+				 minor->debugfs_root, minor);
 
 	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,
 		dev, &msm_gpu_fops);
@@ -238,7 +233,7 @@ int msm_debugfs_init(struct drm_minor *minor)
 			return ret;
 	}
 
-	return ret;
+	return 0;
 }
 #endif
 
-- 
2.25.1