[AMD Official Use Only] Thanks, Greg and Jani. So I have to do the exact opposite.
We do have some NULL dentry check in the drm code. I will remove those instead. Regards, Nirmoy ________________________________ From: Greg KH <gre...@linuxfoundation.org> Sent: Friday, October 8, 2021 1:07 PM To: Jani Nikula <jani.nik...@linux.intel.com> Cc: Das, Nirmoy <nirmoy....@amd.com>; dri-de...@lists.freedesktop.org <dri-de...@lists.freedesktop.org>; intel-gfx@lists.freedesktop.org <intel-gfx@lists.freedesktop.org>; Maarten Lankhorst <maarten.lankho...@linux.intel.com>; Maxime Ripard <mrip...@kernel.org>; Thomas Zimmermann <tzimmerm...@suse.de>; David Airlie <airl...@linux.ie>; Daniel Vetter <dan...@ffwll.ch> Subject: Re: [Intel-gfx] [PATCH 1/5] dri: cleanup debugfs error handling On Fri, Oct 08, 2021 at 12:40:47PM +0300, Jani Nikula wrote: > On Fri, 08 Oct 2021, Nirmoy Das <nirmoy....@amd.com> wrote: > > Debugfs API returns encoded error instead of NULL. > > This patch cleanups drm debugfs error handling to > > properly set dri and its minor's root dentry to NULL. > > > > Also do not error out if dri/minor debugfs directory > > creation fails as a debugfs error is not a fatal error. > > Cc: Greg > > I thought this is the opposite of what Greg's been telling everyone to > do with debugfs. Yes, that is not good. You should never care about the result of a debugfs_create* call. Just take the result, and if it is a directory, save it off to use it for creating a file, no need to check anything. And then throw it away, later, when you want to remove the directory, look it up with a call to debugfs_lookup() and pass that to debugfs_remove() (which does so recursively). There should never be a need to save, or check, the result of any debugfs call. If so, odds are it is being used incorrectly. thanks, greg k-h
