IB/hfi1: Ensure VL index is within bounds
Improve the safety of the code and ensure the array cannot be indexed out of bounds when picking the CPU for a given SDMA engine. Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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