drm/dp_mst: Constify guid in drm_dp_get_mst_branch_by_guid()

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

Cc: Juston Li <juston.li@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <hwentlan@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190903204645.25487-12-lyude@redhat.com

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 22b4dc8e7979851bedb55d2a7c0fc3fdcb36d185..33098084ad701d9ec53945ec6491922befbd77bf 100644 (file)
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2086,7 +2086,7 @@ out:
 
 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;
@@ -2110,7 +2110,7 @@ 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;