GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-21 22:21:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

drm: no need to check return value of debugfs_create functions

Browse source 
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Because there is no need to check these functions, a number of local
functions can be made to return void to simplify things as nothing can
fail.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190613133439.GA6715@kroah.com
This commit is contained in:
Greg Kroah-Hartman 2019-06-13 15:34:39 +02:00 • committed by Daniel Vetter
parent 5b038dcf9d
commit b792e64021
6 changed files with 29 additions and 87 deletions
Download patch file Download diff file Expand all files Collapse all files

53
drivers/gpu/drm/drm_debugfs.c
View file

@ -229,10 +229,6 @@ int drm_debugfs_init(struct drm_minor *minor, int minor_id,
mutex_init(&minor->debugfs_lock);
sprintf(name, "%d", minor_id);
minor->debugfs_root = debugfs_create_dir(name, root);
if (!minor->debugfs_root) {
DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
return -1;
}
ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
minor->debugfs_root, minor);
@ -313,17 +309,15 @@ static void drm_debugfs_remove_all_files(struct drm_minor *minor)
mutex_unlock(&minor->debugfs_lock);
}
int drm_debugfs_cleanup(struct drm_minor *minor)
void drm_debugfs_cleanup(struct drm_minor *minor)
{
if (!minor->debugfs_root)
return 0;
return;
drm_debugfs_remove_all_files(minor);
debugfs_remove_recursive(minor->debugfs_root);
minor->debugfs_root = NULL;
return 0;
}
static int connector_show(struct seq_file *m, void *data)
@ -441,38 +435,24 @@ static const struct file_operations drm_connector_fops = {
.write = connector_write
};
int drm_debugfs_connector_add(struct drm_connector *connector)
void drm_debugfs_connector_add(struct drm_connector *connector)
{
struct drm_minor *minor = connector->dev->primary;
struct dentry *root, *ent;
struct dentry *root;
if (!minor->debugfs_root)
return -1;
return;
root = debugfs_create_dir(connector->name, minor->debugfs_root);
if (!root)
return -ENOMEM;
connector->debugfs_entry = root;
/* force */
ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
&drm_connector_fops);
if (!ent)
goto error;
debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
&drm_connector_fops);
/* edid */
ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root,
connector, &drm_edid_fops);
if (!ent)
goto error;
return 0;
error:
debugfs_remove_recursive(connector->debugfs_entry);
connector->debugfs_entry = NULL;
return -ENOMEM;
debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
&drm_edid_fops);
}
void drm_debugfs_connector_remove(struct drm_connector *connector)
@ -485,7 +465,7 @@ void drm_debugfs_connector_remove(struct drm_connector *connector)
connector->debugfs_entry = NULL;
}
int drm_debugfs_crtc_add(struct drm_crtc *crtc)
void drm_debugfs_crtc_add(struct drm_crtc *crtc)
{
struct drm_minor *minor = crtc->dev->primary;
struct dentry *root;
@ -493,23 +473,14 @@ int drm_debugfs_crtc_add(struct drm_crtc *crtc)
name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
if (!name)
return -ENOMEM;
return;
root = debugfs_create_dir(name, minor->debugfs_root);
kfree(name);
if (!root)
return -ENOMEM;
crtc->debugfs_entry = root;
if (drm_debugfs_crtc_crc_add(crtc))
goto error;
return 0;
error:
drm_debugfs_crtc_remove(crtc);
return -ENOMEM;
drm_debugfs_crtc_crc_add(crtc);
}
void drm_debugfs_crtc_remove(struct drm_crtc *crtc)