drm/i915: Remove the global irq wait queue

... as it has been replaced by per-ring waiters.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -1022,7 +1022,6 @@ i915_wedged_write(struct file *filp,
 		  loff_t *ppos)
 {
 	struct drm_device *dev = filp->private_data;
-	drm_i915_private_t *dev_priv = dev->dev_private;
 	char buf[20];
 	int val = 1;
 
@@ -1038,12 +1037,7 @@ i915_wedged_write(struct file *filp,
 	}
 
 	DRM_INFO("Manually setting wedged to %d\n", val);
-
-	atomic_set(&dev_priv->mm.wedged, val);
-	if (val) {
-		wake_up_all(&dev_priv->irq_queue);
-		queue_work(dev_priv->wq, &dev_priv->error_work);
-	}
+	i915_handle_error(dev, val);
 
 	return cnt;
 }

drivers/gpu/drm/i915/i915_drv.h

@@ -289,7 +289,6 @@ typedef struct drm_i915_private {
 	int current_page;
 	int page_flipping;
 
-	wait_queue_head_t irq_queue;
 	atomic_t irq_received;
 	/** Protects user_irq_refcount and irq_mask_reg */
 	spinlock_t user_irq_lock;
@@ -915,6 +914,7 @@ extern void i915_update_gfx_val(struct drm_i915_private *dev_priv);
 
 /* i915_irq.c */
 void i915_hangcheck_elapsed(unsigned long data);
+void i915_handle_error(struct drm_device *dev, bool wedged);
 extern int i915_irq_emit(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv);
 extern int i915_irq_wait(struct drm_device *dev, void *data,

drivers/gpu/drm/i915/i915_irq.c

@@ -891,7 +891,7 @@ static void i915_report_and_clear_eir(struct drm_device *dev)
  * so userspace knows something bad happened (should trigger collection
  * of a ring dump etc.).
  */
-static void i915_handle_error(struct drm_device *dev, bool wedged)
+void i915_handle_error(struct drm_device *dev, bool wedged)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;