From: Aurabindo Pillai aurabindo.pillai@amd.com

[Why & How] eng_id for DCN303 cannot be more than 1, since we have only two instances of stream encoders.

Check the correct boundary condition for engine ID for DCN303 prevent the potential out of bounds access.

Fixes: cd6d421e3d1a ("drm/amd/display: Initial DC support for Beige Goby") Reported-by: Dan Carpenter dan.carpenter@oracle.com Cc: Stable@vger.kernel.org

Reviewed-by: Chris Park Chris.Park@amd.com Reviewed-by: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Acked-by: Tom Chung chiahsuan.chung@amd.com Signed-off-by: Aurabindo Pillai aurabindo.pillai@amd.com --- drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c index 0a67f8a5656d..d97076648acb 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn303/dcn303_resource.c @@ -372,7 +372,7 @@ static struct stream_encoder *dcn303_stream_encoder_create(enum engine_id eng_id int afmt_inst;

/* Mapping of VPG, AFMT, DME register blocks to DIO block instance */ - if (eng_id <= ENGINE_ID_DIGE) { + if (eng_id <= ENGINE_ID_DIGB) { vpg_inst = eng_id; afmt_inst = eng_id; } else