drm/i915/fbc: don't try to deactivate FBC if it's not enabled

During FBC invalidation, don't call intel_fbc_deactivate if it's not
enabled. This doesn't fix any bug, but helps making the interface
saner.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1453210558-7875-21-git-send-email-paulo.r.zanoni@intel.com

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 912b953..2ed9be2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -982,7 +982,7 @@ void intel_fbc_invalidate(struct drm_i915_private *dev_priv,
 
        fbc->busy_bits |= intel_fbc_get_frontbuffer_bit(fbc) & frontbuffer_bits;
 
-       if (fbc->busy_bits)
+       if (fbc->enabled && fbc->busy_bits)
                intel_fbc_deactivate(dev_priv);
 
        mutex_unlock(&fbc->lock);