[PATCH] drm/i915/display: add lock while printing frontbuffer tracking bits to debugfs

[Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx>]

Add missing spin_lock/unlock

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx>
---
 drivers/gpu/drm/i915/display/intel_display_debugfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 63c1fb9e479f..f05b52381a83 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -43,12 +43,16 @@ static int i915_frontbuffer_tracking(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 
+	spin_lock(&dev_priv->display.fb_tracking.lock);
+
 	seq_printf(m, "FB tracking busy bits: 0x%08x\n",
 		   dev_priv->display.fb_tracking.busy_bits);
 
 	seq_printf(m, "FB tracking flip bits: 0x%08x\n",
 		   dev_priv->display.fb_tracking.flip_bits);
 
+	spin_unlock(&dev_priv->display.fb_tracking.lock);
+
 	return 0;
 }
 
-- 
2.41.0