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drm/i915: Fix WARN_ON() on UP machines 

WARN_ON(!spin_is_locked()) is not a good idea on a UP system w/o
spinlock debugging. Use WARN_ON_SMP() instead.

This check has been added in

commit 8ba2d18520
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Fri Apr 12 15:18:37 2013 +0300

    drm/i915: protect backlight registers and data with a spinlock

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2013-05-22 11:36:40 +03:00 committed by Daniel Vetter
parent a36689cb77
commit df0a679795
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_panel.c
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@ -332,7 +332,7 @@ static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
u32 val;
WARN_ON(!spin_is_locked(&dev_priv->backlight.lock));
WARN_ON_SMP(!spin_is_locked(&dev_priv->backlight.lock));
/* Restore the CTL value if it lost, e.g. GPU reset */