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UCP/WIREUP: Allow self endpoint to skip a device lane. #10953

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UCP/WIREUP: Allow self endpoint to skip a device lane. #10953

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7 changes: 6 additions & 1 deletion src/ucp/wireup/select.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2483,7 +2483,12 @@ ucp_wireup_add_device_lanes(const ucp_wireup_select_params_t *select_params,
found_lane = ucp_wireup_add_bw_lanes(select_params, &bw_info,
mem_type_tl_bitmap, UCP_NULL_LANE,
select_ctx, 0);
if (!found_lane) {
/*
* Allow self endpoint to skip a device lane, as it might only be used
* for memory type-based copy.
*/
if (!found_lane &&
(select_params->address->uuid != select_params->ep->worker->uuid)) {
ucs_error("could not find device lanes");
return UCS_ERR_UNREACHABLE;
}
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