Re: [PATCH v5 5/9] dmaengine: rcar-dmac: slave address are physical

From: Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
To: "Niklas Söderlund"
	<niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>
Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	arnd-r2nGTMty4D4@public.gmane.org,
	geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org,
	vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH v5 5/9] dmaengine: rcar-dmac: slave address are physical
Date: Thu, 17 Mar 2016 13:30:20 +0200	[thread overview]
Message-ID: <1661205.m6h487t3oE@avalon> (raw)
In-Reply-To: <1457404974-1800-6-git-send-email-niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>

Hi Niklas,

Thank you for the patch.

On Tuesday 08 March 2016 03:42:50 Niklas Söderlund wrote:
> Slave addresses coming from a client is physical not dma. Store the
> address using the correct data type. This is in preparation for hooking
> up the dma-mapping API to the slave addresses.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas-1zkq55x86MTxsAP9Fp7wbw@public.gmane.org>
> ---
>  drivers/dma/sh/rcar-dmac.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
> index 7820d07..01cf82f 100644
> --- a/drivers/dma/sh/rcar-dmac.c
> +++ b/drivers/dma/sh/rcar-dmac.c
> @@ -144,8 +144,8 @@ struct rcar_dmac_chan {
> 
>  	unsigned int src_xfer_size;
>  	unsigned int dst_xfer_size;
> -	dma_addr_t src_slave_addr;
> -	dma_addr_t dst_slave_addr;
> +	phys_addr_t src_slave_addr;
> +	phys_addr_t dst_slave_addr;

This moves the cast from phys_addr_t to dma_addr_t from the driver's DMA 
engine operations to other places. I'm not sure there's much value in doing 
so. I'd squash this patch with 7/9, the result will be easier to review.

>  	int mid_rid;
> 
>  	spinlock_t lock;

-- 
Regards,

Laurent Pinchart