Re: [PATCH] pci-dma: Fix x86 dma_alloc_coherent to fully clear all pages returned

[Alan Stern]

On Wed, 18 Feb 2015, Tim Chen wrote:

> > Have you tried doing the experiments I suggested in
> > 
> >         http://marc.info/?l=linux-usb&m=142272448620716&w=2
> > 
> > to determine where the problem occurs?
> > 
> 
> I was bogged down with other things lately and I haven't got a chance to
> test that.  But as you said, there's very few places where xhci 
> call this memory allocation.  So I think the problem has been fairly
> narrowed down for the XHCI folks.

I disagree.  _You_ reported the error.  How can you expect other people 
to figure out where it is with no help from you?

I looked briefly at the xhci-hcd DMA allocation code.  It does not 
contain any obvious mistakes.

Alan Stern

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