linux-kernel - Re: [PATCH -mm 3/7] pci: convert pci_set_dma_mask to call dma_set

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Date:	Mon, 15 Feb 2010 10:33:41 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	James Bottomley <James.Bottomley@...e.de>,
	"David S. Miller" <davem@...emloft.net>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH -mm 3/7] pci: convert pci_set_dma_mask to call
 dma_set_mask

On Fri, 2010-02-12 at 18:33 +0900, FUJITA Tomonori wrote:
> This changes pci_set_dma_mask to call the generic DMA API,
> dma_set_mask.
> 
> pci_set_dma_mask (in drivers/pci/pci.c) does the same things that
> dma_set_mask does on all the architectures that use pci_set_dma_mask;
> calls dma_supprted and sets dev->dma_mask. So we safely change
> pci_set_dma_mask to simply call dma_set_mask.
> 
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> Cc: James Bottomley <James.Bottomley@...e.de>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Jesse Barnes <jbarnes@...tuousgeek.org>

Acked-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>

> Cc: Russell King <linux@....linux.org.uk>
> ---
>  drivers/pci/pci.c |   10 ++++------
>  1 files changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index 315fea4..5c881e9 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -2121,15 +2121,13 @@ void pci_msi_off(struct pci_dev *dev)
>  int
>  pci_set_dma_mask(struct pci_dev *dev, u64 mask)
>  {
> -	if (!pci_dma_supported(dev, mask))
> -		return -EIO;
> -
> -	dev->dma_mask = mask;
> +	int ret = dma_set_mask(&dev->dev, mask);
> +	if (ret)
> +		return ret;
>  	dev_dbg(&dev->dev, "using %dbit DMA mask\n", fls64(mask));
> -
>  	return 0;
>  }
> -    
> +
>  int
>  pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
>  {


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