diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 46c36f5cafb1..bdf6a1b36223 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -368,11 +368,12 @@ void __gen6_gt_force_wake_mt_get(struct drm_i915_private *dev_priv) */ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv) { - WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex)); + unsigned long irqflags; - /* Forcewake is atomic in case we get in here without the lock */ - if (atomic_add_return(1, &dev_priv->forcewake_count) == 1) + spin_lock_irqsave(&dev_priv->gt_lock, irqflags); + if (dev_priv->forcewake_count++ == 0) dev_priv->display.force_wake_get(dev_priv); + spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); } void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) @@ -392,10 +393,12 @@ void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv) */ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv) { - WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex)); + unsigned long irqflags; - if (atomic_dec_and_test(&dev_priv->forcewake_count)) + spin_lock_irqsave(&dev_priv->gt_lock, irqflags); + if (--dev_priv->forcewake_count == 0) dev_priv->display.force_wake_put(dev_priv); + spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); } void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv) @@ -626,6 +629,7 @@ int i915_reset(struct drm_device *dev, u8 flags) * need to */ bool need_display = true; + unsigned long irqflags; int ret; if (!i915_try_reset) @@ -644,8 +648,10 @@ int i915_reset(struct drm_device *dev, u8 flags) case 6: ret = gen6_do_reset(dev, flags); /* If reset with a user forcewake, try to restore */ - if (atomic_read(&dev_priv->forcewake_count)) + spin_lock_irqsave(&dev_priv->gt_lock, irqflags); + if (dev_priv->forcewake_count) dev_priv->display.force_wake_get(dev_priv); + spin_unlock_irqrestore(&dev_priv->gt_lock, irqflags); break; case 5: ret = ironlake_do_reset(dev, flags); |