From ec9c7073bb082412a49466059053ace537c1a30d Mon Sep 17 00:00:00 2001 From: Christian König Date: Tue, 29 Aug 2023 13:01:14 +0200 Subject: drm/debugfs: remove dev->debugfs_list and debugfs_mutex v2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The mutex was completely pointless in the first place since any parallel adding of files to this list would result in random behavior since the list is filled and consumed multiple times. Completely drop that approach and just create the files directly but return -ENODEV while opening the file when the minors are not registered yet. v2: rebase on debugfs directory rework, limit access before minors are registered. Signed-off-by: Christian König Link: https://patchwork.freedesktop.org/patch/msgid/20230829110115.3442-5-christian.koenig@amd.com Reviewed-by: Andi Shyti --- drivers/gpu/drm/drm_debugfs.c | 27 ++------------------------- drivers/gpu/drm/drm_drv.c | 3 --- drivers/gpu/drm/drm_internal.h | 5 ----- drivers/gpu/drm/drm_mode_config.c | 2 -- include/drm/drm_device.h | 15 --------------- 5 files changed, 2 insertions(+), 50 deletions(-) diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 5ec28c0e12d9..d0c6492d5de1 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -308,7 +308,6 @@ int drm_debugfs_register(struct drm_minor *minor, int minor_id, struct dentry *root) { struct drm_device *dev = minor->dev; - struct drm_debugfs_entry *entry, *tmp; char name[64]; INIT_LIST_HEAD(&minor->debugfs_list); @@ -323,30 +322,9 @@ int drm_debugfs_register(struct drm_minor *minor, int minor_id, if (dev->driver->debugfs_init && dev->render != minor) dev->driver->debugfs_init(minor); - list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) { - debugfs_create_file(entry->file.name, 0444, - minor->debugfs_root, entry, &drm_debugfs_entry_fops); - list_del(&entry->list); - } - return 0; } -void drm_debugfs_late_register(struct drm_device *dev) -{ - struct drm_minor *minor = dev->primary; - struct drm_debugfs_entry *entry, *tmp; - - if (!minor) - return; - - list_for_each_entry_safe(entry, tmp, &dev->debugfs_list, list) { - debugfs_create_file(entry->file.name, 0444, - minor->debugfs_root, entry, &drm_debugfs_entry_fops); - list_del(&entry->list); - } -} - int drm_debugfs_remove_files(const struct drm_info_list *files, int count, struct drm_minor *minor) { @@ -416,9 +394,8 @@ void drm_debugfs_add_file(struct drm_device *dev, const char *name, entry->file.data = data; entry->dev = dev; - mutex_lock(&dev->debugfs_mutex); - list_add(&entry->list, &dev->debugfs_list); - mutex_unlock(&dev->debugfs_mutex); + debugfs_create_file(name, 0444, dev->debugfs_root, entry, + &drm_debugfs_entry_fops); } EXPORT_SYMBOL(drm_debugfs_add_file); diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index d28f415cd733..45053f3371ca 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -597,7 +597,6 @@ static void drm_dev_init_release(struct drm_device *dev, void *res) mutex_destroy(&dev->clientlist_mutex); mutex_destroy(&dev->filelist_mutex); mutex_destroy(&dev->struct_mutex); - mutex_destroy(&dev->debugfs_mutex); drm_legacy_destroy_members(dev); } @@ -638,14 +637,12 @@ static int drm_dev_init(struct drm_device *dev, INIT_LIST_HEAD(&dev->filelist_internal); INIT_LIST_HEAD(&dev->clientlist); INIT_LIST_HEAD(&dev->vblank_event_list); - INIT_LIST_HEAD(&dev->debugfs_list); spin_lock_init(&dev->event_lock); mutex_init(&dev->struct_mutex); mutex_init(&dev->filelist_mutex); mutex_init(&dev->clientlist_mutex); mutex_init(&dev->master_mutex); - mutex_init(&dev->debugfs_mutex); ret = drmm_add_action_or_reset(dev, drm_dev_init_release, NULL); if (ret) diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h index dee75a9cc59e..ec8a1e9c19e8 100644 --- a/drivers/gpu/drm/drm_internal.h +++ b/drivers/gpu/drm/drm_internal.h @@ -185,7 +185,6 @@ void drm_debugfs_dev_register(struct drm_device *dev); int drm_debugfs_register(struct drm_minor *minor, int minor_id, struct dentry *root); void drm_debugfs_cleanup(struct drm_minor *minor); -void drm_debugfs_late_register(struct drm_device *dev); void drm_debugfs_connector_add(struct drm_connector *connector); void drm_debugfs_connector_remove(struct drm_connector *connector); void drm_debugfs_crtc_add(struct drm_crtc *crtc); @@ -210,10 +209,6 @@ static inline void drm_debugfs_cleanup(struct drm_minor *minor) { } -static inline void drm_debugfs_late_register(struct drm_device *dev) -{ -} - static inline void drm_debugfs_connector_add(struct drm_connector *connector) { } diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index 87eb591fe9b5..8525ef851540 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -54,8 +54,6 @@ int drm_modeset_register_all(struct drm_device *dev) if (ret) goto err_connector; - drm_debugfs_late_register(dev); - return 0; err_connector: diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index 3cf12b14232d..c490977ee250 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -318,21 +318,6 @@ struct drm_device { */ struct dentry *debugfs_root; - /** - * @debugfs_mutex: - * - * Protects &debugfs_list access. - */ - struct mutex debugfs_mutex; - - /** - * @debugfs_list: - * - * List of debugfs files to be created by the DRM device. The files - * must be added during drm_dev_register(). - */ - struct list_head debugfs_list; - /* Everything below here is for legacy driver, never use! */ /* private: */ #if IS_ENABLED(CONFIG_DRM_LEGACY) -- cgit v1.2.3