IB/Verbs: Use management helper rdma_cap_read_multi_sge()
Introduce helper rdma_cap_read_multi_sge() to help us check if the port of an IB device support RDMA Read Multiple Scatter-Gather Entries. Signed-off-by: Michael Wang <yun.wang@profitbricks.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Tested-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Sean Hefty <sean.hefty@intel.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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