Subject: [PATCH 6/8] drm/i915: Drop the irqs_disabled() check
From: Sebastian Andrzej Siewior <[email-masked]>
Date: Fri, 1 Oct 2021 20:01:03 +0200

The !irqs_disabled() check triggers on PREEMPT_RT even with
i915_sched_engine::lock acquired. The reason is the lock is transformed
into a sleeping lock on PREEMPT_RT and does not disable interrupts.

There is no need to check for disabled interrupts. The lockdep
annotation below already check if the lock has been acquired by the
caller and will yell if the interrupts are not disabled.

Remove the !irqs_disabled() check.

Reported-by: Maarten Lankhorst <[email-masked]>
Acked-by: Tvrtko Ursulin <[email-masked]>
Signed-off-by: Sebastian Andrzej Siewior <[email-masked]>
---
 drivers/gpu/drm/i915/i915_request.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -608,7 +608,6 @@ bool __i915_request_submit(struct i915_r
 
 	RQ_TRACE(request, "\n");
 
-	GEM_BUG_ON(!irqs_disabled());
 	lockdep_assert_held(&engine->sched_engine->lock);
 
 	/*
@@ -717,7 +716,6 @@ void __i915_request_unsubmit(struct i915
 	 */
 	RQ_TRACE(request, "\n");
 
-	GEM_BUG_ON(!irqs_disabled());
 	lockdep_assert_held(&engine->sched_engine->lock);
 
 	/*