netdev - RE: [PATCH v2 2/5] net: ep93xx_eth: pass struct device to DMA API functions

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Message-ID: <ADE657CA350FB648AAC2C43247A983F001F3820B8699@AUSP01VMBX24.collaborationhost.net>
Date:	Thu, 9 Jun 2011 18:40:21 -0500
From:	H Hartley Sweeten <hartleys@...ionengravers.com>
To:	Mika Westerberg <mika.westerberg@....fi>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kernel@...tstofly.org" <kernel@...tstofly.org>,
	"ryan@...ewatersys.com" <ryan@...ewatersys.com>
Subject: RE: [PATCH v2 2/5] net: ep93xx_eth: pass struct device to DMA API
 functions

On Thursday, June 02, 2011 12:00 PM, Mika Westerberg wrote:
>
> We shouldn't use NULL for any DMA API functions, unless we are dealing with
> ISA or EISA device. So pass correct struct dev pointer to these functions.
>
> Signed-off-by: Mika Westerberg <mika.westerberg@....fi>
> Acked-by: Russell King <rmk+kernel@....linux.org.uk>
> ---
>  drivers/net/arm/ep93xx_eth.c |   26 ++++++++++++++++----------
>  1 files changed, 16 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
> index 5a77001..8779d3b 100644
> --- a/drivers/net/arm/ep93xx_eth.c
> +++ b/drivers/net/arm/ep93xx_eth.c
> @@ -159,6 +159,8 @@ struct ep93xx_priv
>  	void __iomem		*base_addr;
>  	int			irq;
>  
> +	struct device		*dma_dev;

Mika,

I just noticed this macro in include/linux/netdevice.h

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
#define SET_NETDEV_DEV(net, pdev)       ((net)->dev.parent = (pdev))

Is there anyway you could use that macro in the probe to save the platform_device
(with it's associated device) instead of introducing a new struct device * in the
private data?

Regards,
Hartley--
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