ch4/ofi: check whether nic pci info is valid#7730
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In the multinic case, provider may provide an invalid "null" pci info, which will result in hwloc failing to obtain topology. Rather than dealing this invalid case in the topology code, let's guard this case and deal with it in the higher layer. In the case of ofi multi-nic, we will simply treat all nics are equally close and equally distribute them among the ranks.
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Pull Request Description
In the multinic case, provider may provide an invalid "null" pci info, which will result in hwloc failing to obtain topology. Rather than dealing this invalid case in the topology code, let's guard this case and deal with it in the higher layer. In the case of ofi multi-nic, we will simply treat all nics are equally close and equally distribute them among the ranks.
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Fixes #7727
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