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i40iw: Add missing memory barrier 

Add missing write memory barrier before writing the
header containing valid bit to the WQE in i40iw_puda_send.

Signed-off-by: Henry Orosco <henry.orosco@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Henry Orosco 2017-06-23 16:04:00 -05:00 committed by Doug Ledford
parent b5e452a04a
commit c5c9d27e6c
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/hw/i40iw/i40iw_puda.c
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@ -408,6 +408,9 @@ enum i40iw_status_code i40iw_puda_send(struct i40iw_sc_qp *qp,
set_64bit_val(wqe, 0, info->paddr);
set_64bit_val(wqe, 8, LS_64(info->len, I40IWQPSQ_FRAG_LEN));
set_64bit_val(wqe, 16, header[0]);
/* Ensure all data is written before writing valid bit */
wmb();
set_64bit_val(wqe, 24, header[1]);
i40iw_debug_buf(qp->dev, I40IW_DEBUG_PUDA, "PUDA SEND WQE", wqe, 32);