Re: [Xen-devel] [PATCH v3 3/3] AMD IOMMU: Check io_handler before registering mmio handler

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> Suravee Suthikulanit <suravee.suthikulpanit@xxxxxxx> 05/25/16 8:52 PM >>>
>On 5/23/2016 3:23 AM, Paul Durrant wrote:
>> > From: suravee.suthikulpanit@xxxxxxx
>> > Sent: 22 May 2016 00:43
>>> > guest_iommu_init tries to register mmio handler before HVM domain
>>> > is initialized. This cause registration to silently failing.
>>> > This patch adds a sanitiy check and puts out error message.
>>> >
>>> > Signed-off-by: Suravee Suthikulapanit <suravee.suthikulpanit@xxxxxxx>
>> This patch is now defunct isn't it?
>
>It is no longer required, but I think this is a good sanity check in 
>case something changes in the future and causing this to be called 
>before the HVM I/O handler initialized.

To be honest, in this case I'm not convinced, no matter that generally
appreciate ASSERT()s getting added.

Jan


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