Quoting Chris Wilson (2018-07-16 13:56:46)
> On reset/wedging, we cancel all pending replies from the HW and we also
> want to cancel an outstanding preemption event. Since we use the same
> function to cancel the pending replies for reset and for a preemption
> event, we can simply clear the active tracking for all.
>
> v2: Keep execlists_user_end() markup for wedging
> v3: Move assignment to inline to hide the bare assignment.
> v4: Alternate version, use user_end for clearing all leftovers
>
> Fixes: 60a943245413 ("drm/i915/execlists: Drop clear_gtiir() on GPU reset")
> Signed-off-by: Chris Wilson <[email protected]>
> Cc: Tvrtko Ursulin <[email protected]>
> ---
> drivers/gpu/drm/i915/intel_lrc.c | 2 +-
> drivers/gpu/drm/i915/intel_ringbuffer.h | 6 ++++++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_lrc.c
> b/drivers/gpu/drm/i915/intel_lrc.c
> index 6fef9d130d55..f9fb32efb97f 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/intel_lrc.c
> @@ -388,7 +388,7 @@ execlists_user_begin(struct intel_engine_execlists
> *execlists,
> inline void
> execlists_user_end(struct intel_engine_execlists *execlists)
> {
> - execlists_clear_active(execlists, EXECLISTS_ACTIVE_USER);
> + execlists_clear_all_active(execlists);
While the doing a simple assignment is nice, we lose that direct link
with user == ACTIVE_USER.
On the whole, I think it's acceptable to use assignment here rather than
clearing the single bit.
-Chris
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