Re: [PATCH v2 2/2] drm/drv: drm_dev_unplug(): Move out drm_dev_put() call

From: Daniel Vetter <daniel-/w4YWyX8dFk@public.gmane.org>
To: "Noralf Trønnes" <noralf-L59+Z2yzLopAfugRpC6u6w@public.gmane.org>
Cc: David1.Zhou-5C7GfCeVMHo@public.gmane.org,
	Andrey.Grodzovsky-5C7GfCeVMHo@public.gmane.org,
	oleksandr_andrushchenko-uRwfk40T5oI@public.gmane.org,
	daniel.vetter-/w4YWyX8dFk@public.gmane.org,
	intel-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	alexander.deucher-5C7GfCeVMHo@public.gmane.org,
	airlied-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org,
	christian.koenig-5C7GfCeVMHo@public.gmane.org
Subject: Re: [PATCH v2 2/2] drm/drv: drm_dev_unplug(): Move out drm_dev_put() call
Date: Mon, 11 Feb 2019 09:28:36 +0100	[thread overview]
Message-ID: <20190211082836.GO23159@phenom.ffwll.local> (raw)
In-Reply-To: <20190208140103.28919-3-noralf-L59+Z2yzLopAfugRpC6u6w@public.gmane.org>

On Fri, Feb 08, 2019 at 03:01:03PM +0100, Noralf Trønnes wrote:
> This makes it possible to use drm_dev_unplug() with the upcoming
> devm_drm_dev_init() which will do drm_dev_put() in its release callback.
> 
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: Christian König <christian.koenig@amd.com>
> Cc: David (ChunMing) Zhou <David1.Zhou@amd.com>
> Cc: Dave Airlie <airlied@redhat.com>
> Cc: Sean Paul <sean@poorly.run>
> Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
> 
> I will take this through drm-misc-next.
> 
> Noralf.
> 
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 +
>  drivers/gpu/drm/drm_drv.c               | 1 -
>  drivers/gpu/drm/udl/udl_drv.c           | 1 +
>  drivers/gpu/drm/xen/xen_drm_front.c     | 1 +
>  4 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index a1bb3773087b..d1f37ba3c118 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -971,6 +971,7 @@ amdgpu_pci_remove(struct pci_dev *pdev)
>  
>  	DRM_ERROR("Device removal is currently not supported outside of fbcon\n");
>  	drm_dev_unplug(dev);
> +	drm_dev_put(dev);
>  	pci_disable_device(pdev);
>  	pci_set_drvdata(pdev, NULL);
>  }
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 05bbc2b622fc..b04982101fcb 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -376,7 +376,6 @@ void drm_dev_unplug(struct drm_device *dev)
>  	synchronize_srcu(&drm_unplug_srcu);
>  
>  	drm_dev_unregister(dev);
> -	drm_dev_put(dev);
>  }
>  EXPORT_SYMBOL(drm_dev_unplug);
>  
> diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
> index 22cd2d13e272..53b7b8c04bc6 100644
> --- a/drivers/gpu/drm/udl/udl_drv.c
> +++ b/drivers/gpu/drm/udl/udl_drv.c
> @@ -107,6 +107,7 @@ static void udl_usb_disconnect(struct usb_interface *interface)
>  	udl_fbdev_unplug(dev);
>  	udl_drop_usb(dev);
>  	drm_dev_unplug(dev);
> +	drm_dev_put(dev);
>  }
>  
>  /*
> diff --git a/drivers/gpu/drm/xen/xen_drm_front.c b/drivers/gpu/drm/xen/xen_drm_front.c
> index 3e78a832d7f9..84aa4d61dc42 100644
> --- a/drivers/gpu/drm/xen/xen_drm_front.c
> +++ b/drivers/gpu/drm/xen/xen_drm_front.c
> @@ -582,6 +582,7 @@ static void xen_drm_drv_fini(struct xen_drm_front_info *front_info)
>  
>  	drm_kms_helper_poll_fini(dev);
>  	drm_dev_unplug(dev);
> +	drm_dev_put(dev);
>  
>  	front_info->drm_info = NULL;
>  
> -- 
> 2.20.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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