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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:06:00 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:06:00 +0000 |
commit | b15a952c52a6825376d3e7f6c1bf5c886c6d8b74 (patch) | |
tree | 1500f2f8f276908a36d8126cb632c0d6b1276764 /debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch | |
parent | Adding upstream version 5.10.209. (diff) | |
download | linux-debian.tar.xz linux-debian.zip |
Adding debian version 5.10.209-2.debian/5.10.209-2debian
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch')
-rw-r--r-- | debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch b/debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch new file mode 100644 index 000000000..722c5567e --- /dev/null +++ b/debian/patches-rt/0254-drm-i915-gt-Only-disable-interrupts-for-the-timeline.patch @@ -0,0 +1,52 @@ +From 63884dc87002ed5187007558a7356e7a4f570e75 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Tue, 7 Jul 2020 12:25:11 +0200 +Subject: [PATCH 254/323] drm/i915/gt: Only disable interrupts for the timeline + lock on !force-threaded +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz + +According to commit + d67739268cf0e ("drm/i915/gt: Mark up the nested engine-pm timeline lock as irqsafe") + +the intrrupts are disabled the code may be called from an interrupt +handler and from preemptible context. +With `force_irqthreads' set the timeline mutex is never observed in IRQ +context so it is not neede to disable interrupts. + +Disable only interrupts if not in `force_irqthreads' mode. + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + drivers/gpu/drm/i915/gt/intel_engine_pm.c | 8 +++++--- + 1 file changed, 5 insertions(+), 3 deletions(-) + +diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c +index f7b2e07e2229..313d8a28e776 100644 +--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c ++++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c +@@ -60,9 +60,10 @@ static int __engine_unpark(struct intel_wakeref *wf) + + static inline unsigned long __timeline_mark_lock(struct intel_context *ce) + { +- unsigned long flags; ++ unsigned long flags = 0; + +- local_irq_save(flags); ++ if (!force_irqthreads) ++ local_irq_save(flags); + mutex_acquire(&ce->timeline->mutex.dep_map, 2, 0, _THIS_IP_); + + return flags; +@@ -72,7 +73,8 @@ static inline void __timeline_mark_unlock(struct intel_context *ce, + unsigned long flags) + { + mutex_release(&ce->timeline->mutex.dep_map, _THIS_IP_); +- local_irq_restore(flags); ++ if (!force_irqthreads) ++ local_irq_restore(flags); + } + + #else +-- +2.43.0 + |