Re: [RFC PATCH v2] Utilize the PCI API in the TTM framework.
From: Konrad Rzeszutek Wilk
Date: Mon Mar 21 2011 - 19:19:56 EST
On Mon, Mar 21, 2011 at 02:11:07PM +0100, Michel Dänzer wrote:
> On Fre, 2011-01-07 at 12:11 -0500, Konrad Rzeszutek Wilk wrote:
> > 1) The 'NULL' when doing dma_alloc_coherent is unsightly. I was toying
> > with modifying the TTM API to pass in 'struct device' or 'struct pci_device'
> > but figured it would make first sense to get your guys input before heading that route.
> It's worse than unsightly: It breaks TTM on PPC. See
> arch/powerpc/include/asm/dma-mapping.h: get_dma_ops() returns NULL if
> NULL is passed in for the device, and most of its callers BUG in that
> case. The exception being dma_supported(), so a possible solution might
> be to use that for checking if dma_alloc_coherent can be used.
> Dave, please prevent this change from entering mainline before there's a
> solution for this.
We do have a fix for it:
Can you tell me if that works for you?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/