linux-kernel - [PATCH 01/21] drm/debugfs: remove checks for return value of drm

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Message-Id: <20200227120232.19413-2-wambui.karugax@gmail.com>
Date:   Thu, 27 Feb 2020 15:02:12 +0300
From:   Wambui Karuga <wambui.karugax@...il.com>
To:     daniel@...ll.ch, airlied@...ux.ie, tzimmermann@...e.de,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org
Cc:     linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 01/21] drm/debugfs: remove checks for return value of drm_debugfs functions.

Since 987d65d01356 (drm: debugfs: make drm_debugfs_create_files() never
fail), there is no need to check the return value of
drm_debugfs_create_files(). Therefore, remove remove unnecessary checks
and error handling statement blocks for its return value.

These changes also enable changing drm_debugfs_create_files() to return
void.

Signed-off-by: Wambui Karuga <wambui.karugax@...il.com>
---
 drivers/gpu/drm/drm_debugfs.c | 49 ++++++++---------------------------
 include/drm/drm_debugfs.h     |  6 ++---
 2 files changed, 14 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index 4e673d318503..d77d2bdcfb2d 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -172,8 +172,8 @@ static const struct file_operations drm_debugfs_fops = {
  * &struct drm_info_list in the given root directory. These files will be removed
  * automatically on drm_debugfs_cleanup().
  */
-int drm_debugfs_create_files(const struct drm_info_list *files, int count,
-			     struct dentry *root, struct drm_minor *minor)
+void drm_debugfs_create_files(const struct drm_info_list *files, int count,
+			      struct dentry *root, struct drm_minor *minor)
 {
 	struct drm_device *dev = minor->dev;
 	struct drm_info_node *tmp;
@@ -199,7 +199,6 @@ int drm_debugfs_create_files(const struct drm_info_list *files, int count,
 		list_add(&tmp->list, &minor->debugfs_list);
 		mutex_unlock(&minor->debugfs_lock);
 	}
-	return 0;
 }
 EXPORT_SYMBOL(drm_debugfs_create_files);
 
@@ -208,56 +207,30 @@ int drm_debugfs_init(struct drm_minor *minor, int minor_id,
 {
 	struct drm_device *dev = minor->dev;
 	char name[64];
-	int ret;
 
 	INIT_LIST_HEAD(&minor->debugfs_list);
 	mutex_init(&minor->debugfs_lock);
 	sprintf(name, "%d", minor_id);
 	minor->debugfs_root = debugfs_create_dir(name, root);
 
-	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
-				       minor->debugfs_root, minor);
-	if (ret) {
-		debugfs_remove(minor->debugfs_root);
-		minor->debugfs_root = NULL;
-		DRM_ERROR("Failed to create core drm debugfs files\n");
-		return ret;
-	}
+	drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
 
-	if (drm_drv_uses_atomic_modeset(dev)) {
-		ret = drm_atomic_debugfs_init(minor);
-		if (ret) {
-			DRM_ERROR("Failed to create atomic debugfs files\n");
-			return ret;
-		}
-	}
+	if (drm_drv_uses_atomic_modeset(dev))
+		drm_atomic_debugfs_init(minor);
 
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
-		ret = drm_framebuffer_debugfs_init(minor);
-		if (ret) {
-			DRM_ERROR("Failed to create framebuffer debugfs file\n");
-			return ret;
-		}
+		drm_framebuffer_debugfs_init(minor);
 
-		ret = drm_client_debugfs_init(minor);
-		if (ret) {
-			DRM_ERROR("Failed to create client debugfs file\n");
-			return ret;
-		}
+		drm_client_debugfs_init(minor);
 	}
 
-	if (dev->driver->debugfs_init) {
-		ret = dev->driver->debugfs_init(minor);
-		if (ret) {
-			DRM_ERROR("DRM: Driver failed to initialize "
-				  "/sys/kernel/debug/dri.\n");
-			return ret;
-		}
-	}
+	if (dev->driver->debugfs_init)
+		dev->driver->debugfs_init(minor);
+
 	return 0;
 }
 
-
 int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
 			     struct drm_minor *minor)
 {
diff --git a/include/drm/drm_debugfs.h b/include/drm/drm_debugfs.h
index 7501e323d383..4d028cc1fd37 100644
--- a/include/drm/drm_debugfs.h
+++ b/include/drm/drm_debugfs.h
@@ -80,9 +80,9 @@ struct drm_info_node {
 };
 
 #if defined(CONFIG_DEBUG_FS)
-int drm_debugfs_create_files(const struct drm_info_list *files,
-			     int count, struct dentry *root,
-			     struct drm_minor *minor);
+void drm_debugfs_create_files(const struct drm_info_list *files,
+			      int count, struct dentry *root,
+			      struct drm_minor *minor);
 int drm_debugfs_remove_files(const struct drm_info_list *files,
 			     int count, struct drm_minor *minor);
 #else
-- 
2.25.0