From be1c1fe21b3a9d48580bdf976c8dac844f456290 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 18 Nov 2013 18:32:36 -0800 Subject: [PATCH] drm/i915: Hold pc8 lock around toggling pc8.gpu_idle We need to hold the pc8 lock around toggling the value of gpu_idle. Signed-off-by: Chris Wilson Cc: Paulo Zanoni Reviewed-by: Paulo Zanoni Signed-off-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index de6edd0f6205..0b77916e7ea6 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6585,18 +6585,22 @@ done: static void hsw_package_c8_gpu_idle(struct drm_i915_private *dev_priv) { + mutex_lock(&dev_priv->pc8.lock); if (!dev_priv->pc8.gpu_idle) { dev_priv->pc8.gpu_idle = true; - hsw_enable_package_c8(dev_priv); + __hsw_enable_package_c8(dev_priv); } + mutex_unlock(&dev_priv->pc8.lock); } static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv) { + mutex_lock(&dev_priv->pc8.lock); if (dev_priv->pc8.gpu_idle) { dev_priv->pc8.gpu_idle = false; - hsw_disable_package_c8(dev_priv); + __hsw_disable_package_c8(dev_priv); } + mutex_unlock(&dev_priv->pc8.lock); } #define for_each_power_domain(domain, mask) \ -- 2.20.1