diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 99f14079880..deaa657292b 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1075,6 +1075,7 @@ 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; @@ -1082,9 +1083,13 @@ static int gen6_drpc_info(struct seq_file *m) 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)) |