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Re: [Qemu-devel] [PATCH] RFC v2: hcd-ohci: add dma error handling
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From: |
Alexey Kardashevskiy |
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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 19:49:42 +1000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
On 07/24/2013 07:05 PM, Benjamin Herrenschmidt wrote:
> 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).
Double checked. "rmmod ohci_hcd; modprobe ohci_hcd" brings it back so we
are good here :)
--
Alexey