[Intel-gfx] [PATCH 06/15] drm/i915: get init power domain for gpu error state capture

[Imre Deak]

Since the state capture happens from a deferred work, we may drop the
last power domain/RPM reference since the error got triggered (from an
interrupt handler for example). I hit this by writing to the i915_wedged
debugfs file.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index b8f64d7..a586c16 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2174,6 +2174,8 @@ static void i915_error_work_func(struct work_struct *work)
 		kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,
 				   reset_event);
 
+		intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
 		/*
 		 * All state reset _must_ be completed before we update the
 		 * reset counter, for otherwise waiters might miss the reset
@@ -2184,6 +2186,8 @@ static void i915_error_work_func(struct work_struct *work)
 
 		intel_display_handle_reset(dev);
 
+		intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
+
 		if (ret == 0) {
 			/*
 			 * After all the gem state is reset, increment the reset
-- 
1.8.4