linux-kernel - Re: No dma_sync_* during pci_probe? (Sparc, post 2.6.22 regression)

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Message-Id: <1198098440.31714.0.camel@pasglop>
Date:	Thu, 20 Dec 2007 08:07:20 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	David Miller <davem@...emloft.net>
Cc:	stefanr@...6.in-berlin.de, sparclinux@...r.kernel.org,
	linux-kernel@...r.kernel.org, gregkh@...e.de, krh@...planet.net,
	linux1394-devel@...ts.sourceforge.net
Subject: Re: No dma_sync_* during pci_probe? (Sparc, post 2.6.22 regression)


On Mon, 2007-12-17 at 16:50 -0800, David Miller wrote:

> The problem is likely what device struct you are passing to
> dma_sync_single_for_device(), it has to be a real pci_dev or similar
> that has it's dev_archdata properly initialized.
> 
> I bet dev_archdata in whatever "struct device" is being passed in has
> a NULL iommu pointer or something like that.
> 
> Oh yeah, I see what you're doing, that won't work, please pass in
> the correct device struct pointer.  Please pass in the &pci_dev->dev
> not this ohci->card.device thing.

Yup, this would crash on powerpc 64 bits as well for the same reason.

Ben.


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