IB/IPoIB: Fix bad error flow in ipoib_add_port()
Error values of ib_query_port() and ib_query_device() weren't propagated correctly. Because of that, ipoib_add_port() could return NULL value, which escaped the IS_ERR() check in ipoib_add_one() and we crashed. Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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