From: Nicholas Kazlauskas Date: Mon, 30 Jul 2018 16:27:23 +0000 (-0400) Subject: drm/amd/display: Add NULL check for enabling dp ss X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fb7b11e1633e50b9a6b3fffe5cd151474aee9802;p=linux.git drm/amd/display: Add NULL check for enabling dp ss [Why] The pointer for integrated_info can be NULL which causes the system to do a null pointer deference and hang on boot. [How] Add a check to ensure that integrated_info is not null before enabling DP ss. Signed-off-by: Nicholas Kazlauskas Reviewed-by: Sun peng Li Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 016587675da4c..a38e7ad36a7e9 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1038,7 +1038,9 @@ static bool construct( link->link_index = init_params->link_index; link->link_id = bios->funcs->get_connector_id(bios, init_params->connector_index); - link->dp_ss_off = !!dc_ctx->dc_bios->integrated_info->dp_ss_control;; + + if (dc_ctx->dc_bios->integrated_info) + link->dp_ss_off = !!dc_ctx->dc_bios->integrated_info->dp_ss_control; if (link->link_id.type != OBJECT_TYPE_CONNECTOR) { dm_error("%s: Invalid Connector ObjectID from Adapter Service for connector index:%d! type %d expected %d\n",