ib_modify_mad(mad_agent, wr_id, 0); 
ib_modify_mad(mad_agent, send_buf, 0); 
void ib_cancel_mad(struct ib_mad_agent *mad_agent, u64 wr_id){	ib_modify_mad(mad_agent, wr_id, 0);}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/34816ad98efe4d47ffd858a0345321f9d85d9420/mad.c/clean/drivers/infiniband/core/mad.c