drm/amdgpu: the warning dereferencing obj for nbio_v7_4

if ras_manager obj null, don't print NBIO err data

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
index fe18df10daaa34babe1662ec1864a2cee97525c0..32cc60ce552181dfe0002acfe9bdcd9038614c0c 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
@@ -383,7 +383,7 @@ static void nbio_v7_4_handle_ras_controller_intr_no_bifring(struct amdgpu_device
                else
                        WREG32_SOC15(NBIO, 0, mmBIF_DOORBELL_INT_CNTL, bif_doorbell_intr_cntl);
 
-               if (!ras->disable_ras_err_cnt_harvest) {
+               if (ras && !ras->disable_ras_err_cnt_harvest && obj) {
                        /*
                         * clear error status after ras_controller_intr
                         * according to hw team and count ue number