drm/amd/display: Fix hubp check in set_cursor_position

Found by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:298
dc_stream_set_cursor_position() error: we previously assumed 'hubp'
could be null (see line 294)

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 4 insertions, 12 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index b00a6040a697..e230cc44a0a7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -263,7 +263,6 @@ bool dc_stream_set_cursor_position(
                 struct input_pixel_processor *ipp = pipe_ctx->plane_res.ipp;
                 struct mem_input *mi = pipe_ctx->plane_res.mi;
                 struct hubp *hubp = pipe_ctx->plane_res.hubp;
-                struct transform *xfm = pipe_ctx->plane_res.xfm;
                 struct dpp *dpp = pipe_ctx->plane_res.dpp;
                 struct dc_cursor_position pos_cpy = *position;
                 struct dc_cursor_mi_param param = {
@@ -294,11 +293,11 @@ bool dc_stream_set_cursor_position(
                 if (mi != NULL && mi->funcs->set_cursor_position != NULL)
                         mi->funcs->set_cursor_position(mi, &pos_cpy, &param);
 
-                if (hubp != NULL && hubp->funcs->set_cursor_position != NULL)
-                        hubp->funcs->set_cursor_position(hubp, &pos_cpy, &param);
+                if (!hubp)
+                        continue;
 
-                if (xfm != NULL && xfm->funcs->set_cursor_position != NULL)
-                        xfm->funcs->set_cursor_position(xfm, &pos_cpy, &param, hubp->curs_attr.width);
+                if (hubp->funcs->set_cursor_position != NULL)
+                        hubp->funcs->set_cursor_position(hubp, &pos_cpy, &param);
 
                 if (dpp != NULL && dpp->funcs->set_cursor_position != NULL)
                         dpp->funcs->set_cursor_position(dpp, &pos_cpy, &param, hubp->curs_attr.width);
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/transform.h b/drivers/gpu/drm/amd/display/dc/inc/hw/transform.h
index 7c08bc62c1f5..ea88997e1bbd 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/transform.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/transform.h
@@ -259,13 +259,6 @@ struct transform_funcs {
                         struct transform *xfm_base,
                         const struct dc_cursor_attributes *attr);
 
-        void (*set_cursor_position)(
-                        struct transform *xfm_base,
-                        const struct dc_cursor_position *pos,
-                        const struct dc_cursor_mi_param *param,
-                        uint32_t width
-                        );
-
 };
 
 const uint16_t *get_filter_2tap_16p(void);