Prepare to allow the execlists submission to be run from underneath a
hardirq timer context (and not just the current softirq context) as is
required for fast preemption resets.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_lrc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index bcebcd6f2848..3e793badf0f2 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -573,6 +573,7 @@ static void execlists_dequeue(struct intel_engine_cs
*engine)
&execlists->port[execlists->port_mask];
struct i915_request *last = port_request(port);
struct rb_node *rb;
+ unsigned long flags;
bool submit = false;
/* Hardware submission is through 2 ports. Conceptually each port
@@ -596,7 +597,7 @@ static void execlists_dequeue(struct intel_engine_cs
*engine)
* and context switches) submission.
*/
- spin_lock_irq(&engine->timeline.lock);
+ spin_lock_irqsave(&engine->timeline.lock, flags);
rb = execlists->first;
GEM_BUG_ON(rb_first(&execlists->queue) != rb);
@@ -757,7 +758,7 @@ static void execlists_dequeue(struct intel_engine_cs
*engine)
GEM_BUG_ON(execlists->first && !port_isset(execlists->port));
unlock:
- spin_unlock_irq(&engine->timeline.lock);
+ spin_unlock_irqrestore(&engine->timeline.lock, flags);
if (submit) {
execlists_user_begin(execlists, execlists->port);
--
2.17.0
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