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Re: [Qemu-devel] [PATCH] RFC v2: hcd-ohci: add dma error handling
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From: |
Benjamin Herrenschmidt |
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Subject: |
Re: [Qemu-devel] [PATCH] RFC v2: hcd-ohci: add dma error handling |
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Date: |
Wed, 24 Jul 2013 19:05:22 +1000 |
On Wed, 2013-07-24 at 18:28 +1000, Alexey Kardashevskiy wrote:
> 1. if a physical device once reported UnrecoverableError, what is it
> expected to be able to do after that? Should ohci_hcd module reloading bring
> it back to life? With this patch, OHCI dies till reboot (but at least it does
> not break other subsystems).
Not sure what the spec says but I assume an HC reset should work. That
and a PCI reset which we can potentially trigger in SW (though we
haven't yet implemented the RTAS interfaces for it).
> 2. is UnrecoverableError a correct event here?
Yes.
Cheers,
Ben.