Callers can pass null in filter (i.e. from returned from the function dpp1_dscl_get_filter_coeffs_64p) and a null check is added to ensure that is not the case.

Cc: stable@vger.kernel.org Fixes: 5e9a81b2c465 ("drm/amd/display: separate scl functions out from dcn10_dpp") Signed-off-by: Ma Ke make24@iscas.ac.cn --- drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_dscl.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_dscl.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_dscl.c index 808bca9fb804..bcafeb7b5b79 100644 --- a/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_dscl.c +++ b/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_dscl.c @@ -248,6 +248,9 @@ static void dpp1_dscl_set_scaler_filter( int pair; uint16_t odd_coef, even_coef;

+ if (!filter) + return; + REG_SET_3(SCL_COEF_RAM_TAP_SELECT, 0, SCL_COEF_RAM_TAP_PAIR_IDX, 0, SCL_COEF_RAM_PHASE, 0,