The code in xcs_resume() probably didn't work as intended. It uses
struct drm_device.irq, which is allocated to 0, but never initialized
by i915 to the device's interrupt number.
v3:
* also use intel_synchronize_hardirq() at another callsite
v2:
* wrap irq code in intel_synchronize_hardirq() (Ville)
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Fixes: 536f77b1caa0 ("drm/i915/gt: Call stop_ring() from ring resume, again")
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_engine_cs.c | 2 +-
drivers/gpu/drm/i915/gt/intel_ring_submission.c | 2 +-
drivers/gpu/drm/i915/i915_irq.c | 5 +++++
drivers/gpu/drm/i915/i915_irq.h | 1 +
4 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 88694822716a..5ca3d1664335 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1229,7 +1229,7 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine)
return true;
/* Waiting to drain ELSP? */
- synchronize_hardirq(to_pci_dev(engine->i915->drm.dev)->irq);
+ intel_synchronize_hardirq(engine->i915);
intel_engine_flush_submission(engine);
/* ELSP is empty, but there are ready requests? E.g. after reset */
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 5d42a12ef3d6..1b5a22a83db6 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -185,7 +185,7 @@ static int xcs_resume(struct intel_engine_cs *engine)
ring->head, ring->tail);
/* Double check the ring is empty & disabled before we resume */
- synchronize_hardirq(engine->i915->drm.irq);
+ intel_synchronize_hardirq(engine->i915);
if (!stop_ring(engine))
goto err;
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 7d0ce8b9f8ed..2203dca19895 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -4575,3 +4575,8 @@ void intel_synchronize_irq(struct drm_i915_private *i915)
{
synchronize_irq(to_pci_dev(i915->drm.dev)->irq);
}
+
+void intel_synchronize_hardirq(struct drm_i915_private *i915)
+{
+ synchronize_hardirq(to_pci_dev(i915->drm.dev)->irq);
+}
diff --git a/drivers/gpu/drm/i915/i915_irq.h b/drivers/gpu/drm/i915/i915_irq.h
index db34d5dbe402..e43b6734f21b 100644
--- a/drivers/gpu/drm/i915/i915_irq.h
+++ b/drivers/gpu/drm/i915/i915_irq.h
@@ -94,6 +94,7 @@ void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv);
void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv);
bool intel_irqs_enabled(struct drm_i915_private *dev_priv);
void intel_synchronize_irq(struct drm_i915_private *i915);
+void intel_synchronize_hardirq(struct drm_i915_private *i915);
int intel_get_crtc_scanline(struct intel_crtc *crtc);
void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
--
2.32.0
