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Re: [Qemu-devel] [PATCH 04/13] usb-ohci: Use universal DMA helper functi

From: Benjamin Herrenschmidt
Subject: Re: [Qemu-devel] [PATCH 04/13] usb-ohci: Use universal DMA helper functions
Date: Fri, 22 Jun 2012 12:28:00 +1000

On Thu, 2012-06-21 at 07:55 -0500, Anthony Liguori wrote:

> As long as we scrub the buffers, returning an unhandled error seems okay to 
> me.
> I've long thought we should have some sort of generic way to throw an error 
> and 
> effectively pause a single device.  I'm not sure how it would work in 
> practice 
> though.

I'll scrub the buffer in dma_memory_rw when reading from the guest in
all failure cases to ensure that we don't use a buffer of stale qemu

In addition I'm doing a separate patch that I'll post later (needs a bit
more time) that improves OHCI's error handling.


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