From dc1d0136a48d7ad858b5158413def90b9d818503 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 14 Apr 2014 20:24:28 +0300 Subject: [PATCH] drm/i915: move getting struct_mutex lower in the callstack during GPU reset MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Getting struct_mutex around the whole intel_enable_gt_powersave() function is not necessary, since it's only needed for the ILK path therein. This will make intel_enable_gt_powersave() useable on the RPM resume path for >=GEN6 (added in an upcoming patch to reset the RPS state during RPM resume), where we can't (and need not) get this mutex. Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_drv.c | 5 +---- drivers/gpu/drm/i915/intel_pm.c | 2 ++ 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 743cdde..5cbd79e 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -781,11 +781,8 @@ int i915_reset(struct drm_device *dev) * reset and the re-install of drm irq. Skip for ironlake per * previous concerns that it doesn't respond well to some forms * of re-init after reset. */ - if (INTEL_INFO(dev)->gen > 5) { - mutex_lock(&dev->struct_mutex); + if (INTEL_INFO(dev)->gen > 5) intel_enable_gt_powersave(dev); - mutex_unlock(&dev->struct_mutex); - } intel_hpd_init(dev); } else { diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 4ebb93c..e5b9f08 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4556,9 +4556,11 @@ void intel_enable_gt_powersave(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; if (IS_IRONLAKE_M(dev)) { + mutex_lock(&dev->struct_mutex); ironlake_enable_drps(dev); ironlake_enable_rc6(dev); intel_init_emon(dev); + mutex_unlock(&dev->struct_mutex); } else if (IS_GEN6(dev) || IS_GEN7(dev)) { /* * PCU communication is slow and this doesn't need to be -- 2.7.4