linux-kernel - Re: swiotlb_alloc_coherent: allocated memory is out of range for device

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Message-ID: <s5hfxmnjzg5.wl%tiwai@suse.de>
Date:	Thu, 23 Oct 2008 13:58:02 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	svens@...ckframe.org, joerg.roedel@....com, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: swiotlb_alloc_coherent: allocated memory is out of range for device

At Thu, 23 Oct 2008 07:22:09 +0200,
I wrote:
> 
> > The current dma_alloc_coherent (asm-x86/dma-mapping.h) handles the gfp
> > flags in the exact same way as the old dma_alloc_coherent
> > (pci-dma.c). Neither sets GFP_DMA even if coherent_dma_mask is
> > 24bits. The old code is fine because of the GFP_DMA retry
> > mechanism. But if coherent_dma_mask is 24bits, there is no point to go
> > into the GFP_DMA retry mechanism. We should use GFP_DMA in the first
> > place.
> > 
> > How about the following patch?
> 
> I'll give it a try later (the machine is in my office).

The patch seems working fine.  Thanks!

Tested-by: Takashi Iwai <tiwai@...e.de>


Takashi
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