From: Dave Airlie <airlied@redhat.com>
Date: Tue, 3 Feb 2009 09:05:12 +0000 (+1000)
Subject: i915: fix unneeded locking in i915 LVDS get modes code.
X-Git-Tag: firefly_0821_release~15600^2~14
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ac048e1734699dd98f4bdf4daf2b9592d4a4d38e;p=firefly-linux-kernel-4.4.55.git

i915: fix unneeded locking in i915 LVDS get modes code.

This code is always called under the lock from the higher layers,
so need to go locking it here.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index b36a5214d8df..cf8da644faf2 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -311,10 +311,8 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
 	if (dev_priv->panel_fixed_mode != NULL) {
 		struct drm_display_mode *mode;
 
-		mutex_lock(&dev->mode_config.mutex);
 		mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
 		drm_mode_probed_add(connector, mode);
-		mutex_unlock(&dev->mode_config.mutex);
 
 		return 1;
 	}