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-rw-r--r--debian/patches-rt/0030-drm-i915-Drop-the-irqs_disabled-check.patch45
1 files changed, 45 insertions, 0 deletions
diff --git a/debian/patches-rt/0030-drm-i915-Drop-the-irqs_disabled-check.patch b/debian/patches-rt/0030-drm-i915-Drop-the-irqs_disabled-check.patch
new file mode 100644
index 000000000..4d49e26f7
--- /dev/null
+++ b/debian/patches-rt/0030-drm-i915-Drop-the-irqs_disabled-check.patch
@@ -0,0 +1,45 @@
+From 6779399c1acfc91f6e9b0bd4dc4abb4f3cb30c78 Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Fri, 1 Oct 2021 20:01:03 +0200
+Subject: [PATCH 30/62] drm/i915: Drop the irqs_disabled() check
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.1/older/patches-6.1.69-rt21.tar.xz
+
+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 <maarten.lankhorst@linux.intel.com>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ drivers/gpu/drm/i915/i915_request.c | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
+index 7ce126a01cbf..64a032dfaa90 100644
+--- a/drivers/gpu/drm/i915/i915_request.c
++++ b/drivers/gpu/drm/i915/i915_request.c
+@@ -609,7 +609,6 @@ bool __i915_request_submit(struct i915_request *request)
+
+ RQ_TRACE(request, "\n");
+
+- GEM_BUG_ON(!irqs_disabled());
+ lockdep_assert_held(&engine->sched_engine->lock);
+
+ /*
+@@ -718,7 +717,6 @@ void __i915_request_unsubmit(struct i915_request *request)
+ */
+ RQ_TRACE(request, "\n");
+
+- GEM_BUG_ON(!irqs_disabled());
+ lockdep_assert_held(&engine->sched_engine->lock);
+
+ /*
+--
+2.43.0
+