linux-kernel - Re: [PATCH] ssb: Partial revert of 4ac5846 to fix coherent DMA mask setting

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Message-Id: <200806121452.24592.mb@bu3sch.de>
Date:	Thu, 12 Jun 2008 14:52:24 +0200
From:	Michael Buesch <mb@...sch.de>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Glauber Costa <gcosta@...hat.com>
Subject: Re: [PATCH] ssb: Partial revert of 4ac5846 to fix coherent DMA mask setting

On Thursday 12 June 2008 14:42:02 Kirill A. Shutemov wrote:
> dma_set_mask() doesn't set coherent_dma_mask, this can cause
> strange error like "powering down PHY" in b44(bz #10473).
> 
> At x86_64 this error had been hidden until aa99b16.

This patch is wrong. I will send the right patch soon.


> Signed-off-by: Kirill A. Shutemov <kirill@...temov.name>
> ---
>  drivers/ssb/main.c |    5 +++--
>  1 files changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
> index 7cf8851..b7fbbc4 100644
> --- a/drivers/ssb/main.c
> +++ b/drivers/ssb/main.c
> @@ -1170,8 +1170,9 @@ int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask)
>  	struct device *dma_dev = ssb_dev->dma_dev;
>  
>  #ifdef CONFIG_SSB_PCIHOST
> -	if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI)
> -		return dma_set_mask(dma_dev, mask);
> +	if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI &&
> +	    !dma_supported(dma_dev, mask))
> +		return -EIO;
>  #endif
>  	dma_dev->coherent_dma_mask = mask;
>  	dma_dev->dma_mask = &dma_dev->coherent_dma_mask;



-- 
Greetings Michael.
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