drm/i915/guc: Initialise doorbell cookie to matching value

Set the initial value of the doorbell cookie from the client.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161129121024.22650-4-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index aaaf392..dd879f0 100644 (file)
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -134,8 +134,8 @@ static int guc_update_doorbell_id(struct intel_guc *guc,
 
        /* Activate the new doorbell */
        __set_bit(new_id, doorbell_bitmap);
-       doorbell->cookie = 0;
        doorbell->db_status = GUC_DOORBELL_ENABLED;
+       doorbell->cookie = client->doorbell_cookie;
        return guc_allocate_doorbell(guc, client);
 }