Re: [PATCH v2 3/7] ACPI/IORT: Set bus DMA mask as appropriate

[Lorenzo Pieralisi <lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>]

On Mon, Jul 23, 2018 at 11:16:08PM +0100, Robin Murphy wrote:
> When an explicit DMA limit is described by firmware, we need to remember
> it regardless of how drivers might subsequently update their devices'
> masks. The new bus_dma_mask field does that.
> 
> CC: Lorenzo Pieralisi <lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>
> CC: Hanjun Guo <hanjun.guo-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> CC: Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>
> Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
> ---
>  drivers/acpi/arm64/iort.c | 1 +
>  1 file changed, 1 insertion(+)

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>

> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index 4a66896e2aa3..bc51cff5505e 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -1014,6 +1014,7 @@ void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size)
>  		 * Limit coherent and dma mask based on size
>  		 * retrieved from firmware.
>  		 */
> +		dev->bus_dma_mask = mask;
>  		dev->coherent_dma_mask = mask;
>  		*dev->dma_mask = mask;
>  	}
> -- 
> 2.17.1.dirty
>