Re: [virtio-dev] [PATCH] virtio-mmio: Specify wait needed in driver during reset

[Srivatsa Vaddagiri <svaddagi@qti.qualcomm.com>]

> > This is following up on the discussion we had earlier on MMIO reset

> > behavior:

> >

> > https://lists.oasis-open.org/archives/virtio-dev/202107/msg00012.html

> > <https://lists.oasis-open.org/archives/virtio-dev/202107/msg00012.html>

> >

> > Suggesting below change to spec to make it explicit what's expected in

> > driver. If this is accepted, I will follow up with a patch to Linux

> > driver.

> >

> > ===

> >

> > Device reset is accomplished by writing 0 to Status register.

> > Explicitly note

> > that a driver needs to wait on Status register read returning 0 before

> > assuming that

> > device reset operation is complete.

> > Signed-off-by: Srivatsa Vaddagiri <svaddagi@qti.qualcomm.com>

>

>

>

> I wonder if it deserves a feature bit.

I see this as fixing a bug in spec/code rather than adding any new feature, so

perhaps no.

- vatsa

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Qualcomm Innovation Center, Inc. is submitting the attached "feedback" as a non-member to the virtio-dev mailing list for consideration and inclusion.