And it's helper, we'll be using this in just a moment.

Cc: Juston Li <juston...@intel.com>
Cc: Imre Deak <imre.d...@intel.com>
Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
Cc: Harry Wentland <hwent...@amd.com>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Signed-off-by: Lyude Paul <ly...@redhat.com>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c 
b/drivers/gpu/drm/drm_dp_mst_topology.c
index 43452872efad..b44d3696c09a 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2060,7 +2060,7 @@ static struct drm_dp_mst_branch 
*drm_dp_get_mst_branch_device(struct drm_dp_mst_
 
 static struct drm_dp_mst_branch *get_mst_branch_device_by_guid_helper(
        struct drm_dp_mst_branch *mstb,
-       uint8_t *guid)
+       const uint8_t *guid)
 {
        struct drm_dp_mst_branch *found_mstb;
        struct drm_dp_mst_port *port;
@@ -2084,7 +2084,7 @@ static struct drm_dp_mst_branch 
*get_mst_branch_device_by_guid_helper(
 
 static struct drm_dp_mst_branch *
 drm_dp_get_mst_branch_device_by_guid(struct drm_dp_mst_topology_mgr *mgr,
-                                    uint8_t *guid)
+                                    const uint8_t *guid)
 {
        struct drm_dp_mst_branch *mstb;
        int ret;
-- 
2.21.0

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