umad_get_pkey - get pkey index from umad buffer
#include <infiniband/umad.h>
int umad_get_pkey(void *umad);
umad_get_pkey() gets the pkey index from the specified umad buffer.
umad_get_pkey() returns value of pkey index (or zero if pkey index is
not supported by user_mad interface).
Sasha Khapyorsky <sashak@voltaire.com>