The other instances of link training are protected with connection_mutex, so do the same in check_mst_status() too.
Signed-off-by: Dhinakaran Pandiyan <[email protected]> --- drivers/gpu/drm/i915/intel_dp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index aab9ba31f79e..644463ba313e 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4191,6 +4191,7 @@ static void intel_dp_handle_test_request(struct intel_dp *intel_dp) static int intel_dp_check_mst_status(struct intel_dp *intel_dp) { + struct drm_device *dev = intel_dp_to_dev(intel_dp); bool bret; u8 esi[DP_DPRX_ESI_LEN] = { 0 }; int ret = 0; @@ -4205,8 +4206,11 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp) if (intel_dp->active_mst_links && !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) { DRM_DEBUG_KMS("channel EQ not ok, retraining\n"); + + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); intel_dp_start_link_train(intel_dp); intel_dp_stop_link_train(intel_dp); + drm_modeset_unlock(&dev->mode_config.connection_mutex); } DRM_DEBUG_KMS("got esi %3ph\n", esi); -- 2.11.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
