[Intel-gfx] [PATCH] drm/i915: Advance seqno upon reseting the GPU following a hang

Mika Kuoppala mika.kuoppala at linux.intel.com
Tue May 14 14:31:41 CEST 2013

Chris Wilson <chris at chris-wilson.co.uk> writes:

> On Mon, May 13, 2013 at 04:10:18PM +0300, Mika Kuoppala wrote:
>> Chris Wilson <chris at chris-wilson.co.uk> writes:
>> > +
>> > +	intel_ring_init_seqno(ring, seqno);
>> > +	for (i = 0; i < ARRAY_SIZE(ring->sync_seqno); i++)
>> > +		ring->sync_seqno[i] = 0;
>> >  }
>> I remember pondering about resetting sync_seqno's
>> inside intel_ring_init_seqno(). Is there reason
>> not to?
> Not a strong one. Conceptually the ring->sync_seqno[] belong to the other
> rings, so I felt it was clumsy for intel_ring_init_seqno() to falsely
> claim ownership and reset its own sync_seqno. But I think we can
> refactor away those qualms with a comment.

The existing intel_ring_init_seqno() already clumsily
resets the sync registers of other rings. As we can't
and wont initialize anything but all of the ring seqnos
at once, the existing code could be more explicit on that.

But for this patch:
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

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