---

yaml --- r: 286851 b: refs/heads/master c: 93b525d h: refs/heads/master i: 286849: 7915d36 286847: db1b22e v: v3
git-mirror · Jan 25, 2012 · b6ee036 · b6ee036
1 parent 0a5a73e
commit b6ee036
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Showing 2 changed files with 9 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 48467a92215ced69a65c89c1b064dd84728a5ed0
+refs/heads/master: 93b525dccf212e50a895792d79d64bdb53312f5c
diff --git a/trunk/drivers/gpu/drm/i915/i915_debugfs.c b/trunk/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1075,16 +1075,21 @@ static int gen6_drpc_info(struct seq_file *m)
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	u32 rpmodectl1, gt_core_status, rcctl1;
+	unsigned forcewake_count;
 	int count=0, ret;
 
 
 	ret = mutex_lock_interruptible(&dev->struct_mutex);
 	if (ret)
 		return ret;
 
-	if (atomic_read(&dev_priv->forcewake_count)) {
-		seq_printf(m, "RC information inaccurate because userspace "
-			      "holds a reference \n");
+	spin_lock_irq(&dev_priv->gt_lock);
+	forcewake_count = dev_priv->forcewake_count;
+	spin_unlock_irq(&dev_priv->gt_lock);
+
+	if (forcewake_count) {
+		seq_printf(m, "RC information inaccurate because somebody "
+			      "holds a forcewake reference \n");
 	} else {
 		/* NB: we cannot use forcewake, else we read the wrong values */
 		while (count++ < 50 && (I915_READ_NOTRACE(FORCEWAKE_ACK) & 1))