linux-kernel - Re: [PATCH v2 2/2] drm/v3d: replace obj lookup steps with drm_gem_objects

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Date:   Sun, 18 Dec 2022 23:14:59 -0100
From:   Melissa Wen <mwen@...lia.com>
To:     Maíra Canal <mcanal@...lia.com>
Cc:     emma@...olt.net, airlied@...il.com, daniel@...ll.ch,
        kernel-dev@...lia.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [PATCH v2 2/2] drm/v3d: replace obj lookup steps with
 drm_gem_objects_lookup

On 12/05, Maíra Canal wrote:
> On 12/5/22 10:55, Melissa Wen wrote:
> > As v3d_lookup_bos() performs the same steps as drm_gem_objects_lookup(),
> > replace the explicit code in v3d to simply use the DRM function.
> > 
> > Signed-off-by: Melissa Wen <mwen@...lia.com>
> 
> Reviewed-by: Maíra Canal <mcanal@...lia.com>

Applied this series to drm-misc-next.

Thanks,

Melissa

> 
> Best Regards,
> - Maíra Canal
> 
> > ---
> >  drivers/gpu/drm/v3d/v3d_gem.c | 49 +++--------------------------------
> >  1 file changed, 3 insertions(+), 46 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
> > index 31a37572c11d..6e152ef26358 100644
> > --- a/drivers/gpu/drm/v3d/v3d_gem.c
> > +++ b/drivers/gpu/drm/v3d/v3d_gem.c
> > @@ -299,10 +299,6 @@ v3d_lookup_bos(struct drm_device *dev,
> >  	       u64 bo_handles,
> >  	       u32 bo_count)
> >  {
> > -	u32 *handles;
> > -	int ret = 0;
> > -	int i;
> > -
> >  	job->bo_count = bo_count;
> >  
> >  	if (!job->bo_count) {
> > @@ -313,48 +309,9 @@ v3d_lookup_bos(struct drm_device *dev,
> >  		return -EINVAL;
> >  	}
> >  
> > -	job->bo = kvmalloc_array(job->bo_count,
> > -				 sizeof(struct drm_gem_dma_object *),
> > -				 GFP_KERNEL | __GFP_ZERO);
> > -	if (!job->bo) {
> > -		DRM_DEBUG("Failed to allocate validated BO pointers\n");
> > -		return -ENOMEM;
> > -	}
> > -
> > -	handles = kvmalloc_array(job->bo_count, sizeof(u32), GFP_KERNEL);
> > -	if (!handles) {
> > -		ret = -ENOMEM;
> > -		DRM_DEBUG("Failed to allocate incoming GEM handles\n");
> > -		goto fail;
> > -	}
> > -
> > -	if (copy_from_user(handles,
> > -			   (void __user *)(uintptr_t)bo_handles,
> > -			   job->bo_count * sizeof(u32))) {
> > -		ret = -EFAULT;
> > -		DRM_DEBUG("Failed to copy in GEM handles\n");
> > -		goto fail;
> > -	}
> > -
> > -	spin_lock(&file_priv->table_lock);
> > -	for (i = 0; i < job->bo_count; i++) {
> > -		struct drm_gem_object *bo = idr_find(&file_priv->object_idr,
> > -						     handles[i]);
> > -		if (!bo) {
> > -			DRM_DEBUG("Failed to look up GEM BO %d: %d\n",
> > -				  i, handles[i]);
> > -			ret = -ENOENT;
> > -			spin_unlock(&file_priv->table_lock);
> > -			goto fail;
> > -		}
> > -		drm_gem_object_get(bo);
> > -		job->bo[i] = bo;
> > -	}
> > -	spin_unlock(&file_priv->table_lock);
> > -
> > -fail:
> > -	kvfree(handles);
> > -	return ret;
> > +	return drm_gem_objects_lookup(file_priv,
> > +				      (void __user *)(uintptr_t)bo_handles,
> > +				      job->bo_count, &job->bo);
> >  }
> >  
> >  static void

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