From: Mika Kuoppala Date: Thu, 15 May 2014 17:58:07 +0000 (+0300) Subject: drm/i915: Bail out early on gen6_signal if no semaphores X-Git-Tag: firefly_0821_release~176^2~3773^2~38^2~120 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6e450ab24dc645d776e65bbb91fc5f6788087c32;p=firefly-linux-kernel-4.4.55.git drm/i915: Bail out early on gen6_signal if no semaphores If we dont have semaphores enabled, we allocate 4 dwords for signalling. But end up emitting more regardless. Fix this by bailing out early if semaphores are not enabled. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78274 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78283 Signed-off-by: Mika Kuoppala Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 3974e827c472..93b4062481de 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -684,6 +684,8 @@ static int gen6_signal(struct intel_ring_buffer *signaller, #define MBOX_UPDATE_DWORDS 4 if (i915_semaphore_is_enabled(dev)) num_dwords += ((I915_NUM_RINGS-1) * MBOX_UPDATE_DWORDS); + else + return intel_ring_begin(signaller, num_dwords); ret = intel_ring_begin(signaller, num_dwords); if (ret)