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Re: [qemu-s390x] [PATCH 10/15] s390-bios: Support for running format-0/1


From: Cornelia Huck
Subject: Re: [qemu-s390x] [PATCH 10/15] s390-bios: Support for running format-0/1 channel programs
Date: Wed, 27 Feb 2019 15:06:05 +0100

On Wed, 27 Feb 2019 08:32:58 -0500
"Jason J. Herne" <address@hidden> wrote:

> On 2/4/19 6:13 AM, Cornelia Huck wrote:

> > What I don't understand is why we do the basic sense after an IFCC?
> > Wouldn't it make more sense to simply retry the original command in
> > that case?
> >   
> 
> I assumed it might be needed to clear status. It seems not. I'll modify that 
> code path 
> accordingly.

Yes, a tsch should be enough to clear any pending status. It doesn't
clear available sense data, but if you get sense data on an ifcc, the
hardware/hypervisor is doing something really really strange :)



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