linux-kernel - Re: [PATCH] x86: gart alloc_coherent doesn't need to check NULL device argument

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Date:	Fri, 5 Sep 2008 12:41:29 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org
Subject: Re: [PATCH] x86: gart alloc_coherent doesn't need to check NULL device argument

True, thanks.

On Fri, Sep 05, 2008 at 05:58:49PM +0900, FUJITA Tomonori wrote:
> asm/dma-mapping.h guarantees that gart alloc_coherent doesn't get NULL
> device argument.
> 
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>

Acked-by: Joerg Roedel <joerg.roedel@....com>

> ---
>  arch/x86/kernel/pci-gart_64.c |    3 ---
>  1 files changed, 0 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
> index 4d08649..0b99d4a 100644
> --- a/arch/x86/kernel/pci-gart_64.c
> +++ b/arch/x86/kernel/pci-gart_64.c
> @@ -506,9 +506,6 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
>  
>  	align_mask = (1UL << get_order(size)) - 1;
>  
> -	if (!dev)
> -		dev = &x86_dma_fallback_dev;
> -
>  	*dma_addr = dma_map_area(dev, __pa(vaddr), size, DMA_BIDIRECTIONAL,
>  				 align_mask);
>  	flush_gart();
> -- 
> 1.5.4.2
> 
> 

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