diff options
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 1e7c638873c8..c21bbfc3d714 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -545,8 +545,13 @@ int drm_dp_read_downstream_info(struct drm_dp_aux *aux, ret = drm_dp_dpcd_read(aux, DP_DOWNSTREAM_PORT_0, downstream_ports, len); if (ret < 0) return ret; + if (ret != len) + return -EIO; + + DRM_DEBUG_KMS("%s: DPCD DFP: %*ph\n", + aux->name, len, downstream_ports); - return ret == len ? 0 : -EIO; + return 0; } EXPORT_SYMBOL(drm_dp_read_downstream_info); |