drm/amd/display: enable_hpo_dp_link_output: Check link_res->hpo_dp_link_enc before...

From Alex Hung
e0b065ec636d66022ab7057e1635e9a941a42820 in linux-6.6.y/6.6.55
d925c04d974c657d10471c0c2dba3bc9c7d994ee in mainline linux

diff --git a/sys/dev/pci/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c b/sys/dev/pci/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c
index d0b0553..9a349de 100644 (file)
--- a/sys/dev/pci/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c
+++ b/sys/dev/pci/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c
@@ -110,6 +110,11 @@ void enable_hpo_dp_link_output(struct dc_link *link,
                enum clock_source_id clock_source,
                const struct dc_link_settings *link_settings)
 {
+       if (!link_res->hpo_dp_link_enc) {
+               DC_LOG_ERROR("%s: invalid hpo_dp_link_enc\n", __func__);
+               return;
+       }
+
        if (link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating)
                link->dc->res_pool->dccg->funcs->set_symclk32_le_root_clock_gating(
                                link->dc->res_pool->dccg,