Re: swiotlb_alloc_coherent: allocated memory is out of range for device
From: Takashi Iwai
Date: Thu Oct 23 2008 - 05:58:19 EST
At Thu, 23 Oct 2008 07:22:09 +0200,
> > 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@xxxxxxx>
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