[PATCH v4 05/10] arm64: do not initialize arm64_swiotlb if dma_ops is already set

[Catalin Marinas]

On Thu, Aug 15, 2013 at 12:10:49PM +0100, Stefano Stabellini wrote:
> Signed-off-by: Stefano Stabellini <stefano.stabellini at eu.citrix.com>
> CC: catalin.marinas at arm.com
> CC: will.deacon at arm.com
> ---
>  arch/arm64/mm/dma-mapping.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
> index 4bd7579..a006e84 100644
> --- a/arch/arm64/mm/dma-mapping.c
> +++ b/arch/arm64/mm/dma-mapping.c
> @@ -63,6 +63,8 @@ static struct dma_map_ops arm64_swiotlb_dma_ops = {
>  
>  void __init arm64_swiotlb_init(void)
>  {
> +	if (dma_ops != NULL)
> +		return;
>  	dma_ops = &arm64_swiotlb_dma_ops;
>  	swiotlb_init(1);

Acked-by: Catalin Marinas <catalin.marinas at arm.com>