linux-kernel - Re: [RFC 4/5] dma-buf/fence-array: add fence_array_get

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Message-ID: <20160623203556.GA1086@nuc-i3427.alporthouse.com>
Date:	Thu, 23 Jun 2016 21:35:56 +0100
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Gustavo Padovan <gustavo@...ovan.org>
Cc:	dri-devel@...ts.freedesktop.org, marcheu@...gle.com,
	Daniel Stone <daniels@...labora.com>, seanpaul@...gle.com,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linux-kernel@...r.kernel.org, laurent.pinchart@...asonboard.com,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	John Harrison <John.C.Harrison@...el.com>, m.chehab@...sung.com
Subject: Re: [RFC 4/5] dma-buf/fence-array: add fence_array_get_fences()

On Thu, Jun 23, 2016 at 12:29:49PM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> 
> This function returns a copy of the array of fences.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> ---
>  drivers/dma-buf/fence-array.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/dma-buf/fence-array.c b/drivers/dma-buf/fence-array.c
> index 601448a..ce98249 100644
> --- a/drivers/dma-buf/fence-array.c
> +++ b/drivers/dma-buf/fence-array.c
> @@ -33,6 +33,19 @@ static const char *fence_array_get_timeline_name(struct fence *fence)
>  	return "unbound";
>  }
>  
> +static struct fence **fence_array_get_fences(struct fence *fence)
> +{
> +	struct fence_array *array = to_fence_array(fence);
> +	struct fence **fences;
> +
> +	fences = kmalloc(array->num_fences * sizeof(*fences), GFP_KERNEL);
> +	if (!fences)
> +		return NULL;
> +
> +	memcpy(fences, array->fences, array->num_fences * sizeof(*fences));
> +	return fences;

	return kmemdup(array->fences,
		       array->num_fences * sizeof(*array->fences),
		       GFP_KERNEL);

-- 
Chris Wilson, Intel Open Source Technology Centre