linux-kernel - [ 54/60] drm/i915: initialize gt_lock early with other spin locks

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Message-Id: <20130813063338.716215685@linuxfoundation.org>
Date:	Mon, 12 Aug 2013 23:34:21 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Sedat Dilek <sedat.dilek@...il.com>,
	Jani Nikula <jani.nikula@...el.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Zhouping Liu <zliu@...hat.com>
Subject: [ 54/60] drm/i915: initialize gt_lock early with other spin locks

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jani Nikula <jani.nikula@...ux.intel.com>

commit 14c5cec5d0cd73e7e9d4fbea2bbfeea8f3ade871 upstream.

commit 181d1b9e31c668259d3798c521672afb8edd355c
Author: Daniel Vetter <daniel.vetter@...ll.ch>
Date:   Sun Jul 21 13:16:24 2013 +0200

    drm/i915: fix up gt init sequence fallout

moved dev_priv->gt_lock initialization after use. Do the initialization
much earlier with other spin lock initializations.

Reported-by: Sedat Dilek <sedat.dilek@...il.com>
Signed-off-by: Jani Nikula <jani.nikula@...el.com>
Tested-by: Sedat Dilek <sedat.dilek@...il.com>
Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
Signed-off-by: Zhouping Liu <zliu@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/i915/i915_dma.c |    1 +
 drivers/gpu/drm/i915/intel_pm.c |    2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1514,6 +1514,7 @@ int i915_driver_load(struct drm_device *
 	spin_lock_init(&dev_priv->irq_lock);
 	spin_lock_init(&dev_priv->gpu_error.lock);
 	spin_lock_init(&dev_priv->rps.lock);
+	spin_lock_init(&dev_priv->gt_lock);
 	mutex_init(&dev_priv->dpio_lock);
 	mutex_init(&dev_priv->rps.hw_lock);
 	mutex_init(&dev_priv->modeset_restore_lock);
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4507,8 +4507,6 @@ void intel_gt_init(struct drm_device *de
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
-	spin_lock_init(&dev_priv->gt_lock);
-
 	if (IS_VALLEYVIEW(dev)) {
 		dev_priv->gt.force_wake_get = vlv_force_wake_get;
 		dev_priv->gt.force_wake_put = vlv_force_wake_put;


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