From 959cbc1b8a2534bb930d237ee164893a4936a4d6 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Wed, 16 Oct 2013 17:25:50 +0300 Subject: [PATCH] drm/i915: change power_well->lock to be mutex There is no hard need for this to be a spin lock, as we don't take these locks in irq context from anywhere. An upcoming patch will add calls to punit read/write functions from within regions protected by this lock and those functions need a mutex in turn. As a solution for that convert the spin lock to be a mutex. Signed-off-by: Imre Deak Reviewed-by: Jesse Barnes Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.h | 2 +- drivers/gpu/drm/i915/intel_pm.c | 26 +++++++++++++------------- 2 files changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index f3a930d3ade4..faface98ba37 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -909,7 +909,7 @@ struct intel_ilk_power_mgmt { /* Power well structure for haswell */ struct i915_power_well { struct drm_device *device; - spinlock_t lock; + struct mutex lock; /* power well enable/disable usage count */ int count; int i915_request; diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 97abb33e8c92..f3136659877a 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -5626,9 +5626,9 @@ void intel_display_power_get(struct drm_device *dev, if (is_always_on_power_domain(dev, domain)) return; - spin_lock_irq(&power_well->lock); + mutex_lock(&power_well->lock); __intel_power_well_get(power_well); - spin_unlock_irq(&power_well->lock); + mutex_unlock(&power_well->lock); } void intel_display_power_put(struct drm_device *dev, @@ -5643,9 +5643,9 @@ void intel_display_power_put(struct drm_device *dev, if (is_always_on_power_domain(dev, domain)) return; - spin_lock_irq(&power_well->lock); + mutex_lock(&power_well->lock); __intel_power_well_put(power_well); - spin_unlock_irq(&power_well->lock); + mutex_unlock(&power_well->lock); } static struct i915_power_well *hsw_pwr; @@ -5656,9 +5656,9 @@ void i915_request_power_well(void) if (WARN_ON(!hsw_pwr)) return; - spin_lock_irq(&hsw_pwr->lock); + mutex_lock(&hsw_pwr->lock); __intel_power_well_get(hsw_pwr); - spin_unlock_irq(&hsw_pwr->lock); + mutex_unlock(&hsw_pwr->lock); } EXPORT_SYMBOL_GPL(i915_request_power_well); @@ -5668,9 +5668,9 @@ void i915_release_power_well(void) if (WARN_ON(!hsw_pwr)) return; - spin_lock_irq(&hsw_pwr->lock); + mutex_lock(&hsw_pwr->lock); __intel_power_well_put(hsw_pwr); - spin_unlock_irq(&hsw_pwr->lock); + mutex_unlock(&hsw_pwr->lock); } EXPORT_SYMBOL_GPL(i915_release_power_well); @@ -5681,7 +5681,7 @@ int i915_init_power_well(struct drm_device *dev) hsw_pwr = &dev_priv->power_well; hsw_pwr->device = dev; - spin_lock_init(&hsw_pwr->lock); + mutex_init(&hsw_pwr->lock); hsw_pwr->count = 0; return 0; @@ -5703,7 +5703,7 @@ void intel_set_power_well(struct drm_device *dev, bool enable) if (!i915_disable_power_well && !enable) return; - spin_lock_irq(&power_well->lock); + mutex_lock(&power_well->lock); /* * This function will only ever contribute one @@ -5722,7 +5722,7 @@ void intel_set_power_well(struct drm_device *dev, bool enable) __intel_power_well_put(power_well); out: - spin_unlock_irq(&power_well->lock); + mutex_unlock(&power_well->lock); } static void intel_resume_power_well(struct drm_device *dev) @@ -5733,9 +5733,9 @@ static void intel_resume_power_well(struct drm_device *dev) if (!HAS_POWER_WELL(dev)) return; - spin_lock_irq(&power_well->lock); + mutex_lock(&power_well->lock); __intel_set_power_well(dev, power_well->count > 0); - spin_unlock_irq(&power_well->lock); + mutex_unlock(&power_well->lock); } /* -- 2.11.0