[PATCH 50/51] drm/udl: drop drm_driver.release hook

[Thomas Zimmermann]

Hi

Am 28.02.20 um 09:40 schrieb Daniel Vetter:
> On Fri, Feb 28, 2020 at 8:44 AM Thomas Zimmermann <tzimmermann at suse.de> wrote:
>>
>> Hi Daniel
>>
>> Am 27.02.20 um 19:15 schrieb Daniel Vetter:
>>> There's only two functions called from that:
>>> drm_kms_helper_poll_fini() and udl_free_urb_list(). Both of these are
>>> also called from the ubs_driver->disconnect hook, so entirely
>>> pointless to do the same again in the ->release hook.
>>
>> The disconnect hook calls drm_kms_helper_poll_disable() instead if
>> _fini(). They are the same, except that _disable() does not clear
>> dev->mode_config.poll_enabled to false. Is this OK?
> 
> oops, I overlooked that. But yeah for driver shutdown it's the same
> really, we're not going to re-enable. _disable is meant for suspend so
> youc an re-enable again on resume.
> 
> I'll augment the commit message on the next round to clarify that.

Well, we have a managed API. It could support
drmm_kms_helper_poll_init(). :)

Best regards
Thomas

> -Daniel
> 
> 
>> Best regards
>> Thomas
>>
>>>
>>> Furthermore by the time we clean up the drm_driver we really shouldn't
>>> be touching hardware anymore, so stopping the poll worker and freeing
>>> the urb allocations in ->disconnect is the right thing to do.
>>>
>>> Now disconnect still cleans things up before unregistering the driver,
>>> but that's a different issue.
>>>
>>> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
>>> Cc: Dave Airlie <airlied at redhat.com>
>>> Cc: Sean Paul <sean at poorly.run>
>>> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
>>> Cc: Thomas Zimmermann <tzimmermann at suse.de>
>>> Cc: Emil Velikov <emil.l.velikov at gmail.com>
>>> Cc: Gerd Hoffmann <kraxel at redhat.com>
>>> Cc: "Noralf Trønnes" <noralf at tronnes.org>
>>> Cc: Sam Ravnborg <sam at ravnborg.org>
>>> Cc: Thomas Gleixner <tglx at linutronix.de>
>>> Cc: Alex Deucher <alexander.deucher at amd.com>
>>> ---
>>>  drivers/gpu/drm/udl/udl_drv.c  |  6 ------
>>>  drivers/gpu/drm/udl/udl_drv.h  |  1 -
>>>  drivers/gpu/drm/udl/udl_main.c | 10 ----------
>>>  3 files changed, 17 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
>>> index b447fb053e78..7f140898df3e 100644
>>> --- a/drivers/gpu/drm/udl/udl_drv.c
>>> +++ b/drivers/gpu/drm/udl/udl_drv.c
>>> @@ -34,14 +34,8 @@ static int udl_usb_resume(struct usb_interface *interface)
>>>
>>>  DEFINE_DRM_GEM_FOPS(udl_driver_fops);
>>>
>>> -static void udl_driver_release(struct drm_device *dev)
>>> -{
>>> -     udl_fini(dev);
>>> -}
>>> -
>>>  static struct drm_driver driver = {
>>>       .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
>>> -     .release = udl_driver_release,
>>>
>>>       /* gem hooks */
>>>       .gem_create_object = udl_driver_gem_create_object,
>>> diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
>>> index 1de7eb1b6aac..2642f94a63fc 100644
>>> --- a/drivers/gpu/drm/udl/udl_drv.h
>>> +++ b/drivers/gpu/drm/udl/udl_drv.h
>>> @@ -76,7 +76,6 @@ int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
>>>  void udl_urb_completion(struct urb *urb);
>>>
>>>  int udl_init(struct udl_device *udl);
>>> -void udl_fini(struct drm_device *dev);
>>>
>>>  int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
>>>                    const char *front, char **urb_buf_ptr,
>>> diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
>>> index 538718919916..f5d27f2a5654 100644
>>> --- a/drivers/gpu/drm/udl/udl_main.c
>>> +++ b/drivers/gpu/drm/udl/udl_main.c
>>> @@ -351,13 +351,3 @@ int udl_drop_usb(struct drm_device *dev)
>>>       udl_free_urb_list(dev);
>>>       return 0;
>>>  }
>>> -
>>> -void udl_fini(struct drm_device *dev)
>>> -{
>>> -     struct udl_device *udl = to_udl(dev);
>>> -
>>> -     drm_kms_helper_poll_fini(dev);
>>> -
>>> -     if (udl->urbs.count)
>>> -             udl_free_urb_list(dev);
>>> -}
>>>
>>
>> --
>> Thomas Zimmermann
>> Graphics Driver Developer
>> SUSE Software Solutions Germany GmbH
>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>> (HRB 36809, AG Nürnberg)
>> Geschäftsführer: Felix Imendörffer
>>
> 
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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