linux-kernel - Re: [PATCH v8 3/8] drm/managed: Add DRM-managed alloc_ordered

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Message-ID: <fd940912-44b1-4009-988b-8b6d3e52f88f@suse.de>
Date: Tue, 14 Jan 2025 15:25:02 +0100
From: Thomas Zimmermann <tzimmermann@...e.de>
To: Louis Chauvet <louis.chauvet@...tlin.com>,
 Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
 Melissa Wen <melissa.srw@...il.com>, Maíra Canal
 <mairacanal@...eup.net>, Haneen Mohammed <hamohammed.sa@...il.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Simona Vetter <simona.vetter@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net,
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com,
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com,
 seanpaul@...gle.com, nicolejadeyee@...gle.com
Subject: Re: [PATCH v8 3/8] drm/managed: Add DRM-managed
 alloc_ordered_workqueue

Hi


Am 14.01.25 um 15:05 schrieb Louis Chauvet:
> Add drmm_alloc_ordered_workqueue(), a helper that provides managed ordered
> workqueue cleanup. The workqueue will be destroyed with the final
> reference of the DRM device.
>
> Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
>
> ---
>
> Hi Thomas,
>
> I noted that you wanted to mark this as Reviewed, but as this was not
> the complete patch, I prefered to have a confirmation before merging the
> patch.
>
> Thanks for your time,
> Louis Chauvet
> ---
>   drivers/gpu/drm/drm_managed.c |  8 ++++++++
>   include/drm/drm_managed.h     | 12 ++++++++++++
>   2 files changed, 20 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_managed.c b/drivers/gpu/drm/drm_managed.c
> index 79ce86a5bd67a7201f5d60550a12364f2628e0ec..1589c28410f23b5a1e93dd1638420b3ae5c4b854 100644
> --- a/drivers/gpu/drm/drm_managed.c
> +++ b/drivers/gpu/drm/drm_managed.c
> @@ -310,3 +310,11 @@ void __drmm_mutex_release(struct drm_device *dev, void *res)
>   	mutex_destroy(lock);
>   }
>   EXPORT_SYMBOL(__drmm_mutex_release);
> +
> +void __drmm_destroy_workqueue(struct drm_device *device, void *res)
> +{
> +	struct workqueue_struct *wq = res;
> +
> +	destroy_workqueue(wq);
> +}
> +EXPORT_SYMBOL(__drmm_destroy_workqueue);
> diff --git a/include/drm/drm_managed.h b/include/drm/drm_managed.h
> index f547b09ca0239dd7c4fb734038bae4438321395c..96d9b0e811675fe66d5d48f02b17bc7de2ac437e 100644
> --- a/include/drm/drm_managed.h
> +++ b/include/drm/drm_managed.h
> @@ -127,4 +127,16 @@ void __drmm_mutex_release(struct drm_device *dev, void *res);
>   	drmm_add_action_or_reset(dev, __drmm_mutex_release, lock);	     \
>   })									     \
>   
> +void __drmm_destroy_workqueue(struct drm_device *device, void *wq);

A comment on the naming. This is the release helper for the workqueue. 
Rather call it __drm_workqueue_release(). The current name sounds like 
it is a drmm wrapper around destroy_workqueue(), which it isn't.

Apart from that,

Reviewed-by: Thomas Zimmermann <tzimmermann@...e.de>

Best regards
Thomas

> +
> +#define drmm_alloc_ordered_workqueue(dev, fmt, flags, args...)					\
> +	({											\
> +		struct workqueue_struct *wq = alloc_ordered_workqueue(fmt, flags, ##args);	\
> +		wq ? ({										\
> +			int ret = drmm_add_action_or_reset(dev, __drmm_destroy_workqueue, wq);	\
> +			ret ? ERR_PTR(ret) : wq;						\
> +		}) :										\
> +			wq;									\
> +	})
> +
>   #endif
>

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)