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Commit 56b2f523 authored by Christopher Bednarz's avatar Christopher Bednarz Committed by Doug Ledford
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i40iw: Clear CQP Head/Tail during initialization 



Clear Control Queue Pair (CQP) Head/Tail on CQP
initialization as during an adapter reset, these
values are not reinitialized. Tail is cleared by
writing 0 to CQP's tail register. Head is cleared
by writing 0 to CQP's doorbell register.

Fixes: 86dbcd0f ("i40iw: add file to handle cqp calls")
Signed-off-by: default avatarChristopher Bednarz <christopher.n.bednarz@intel.com>
Signed-off-by: default avatarShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 11969238

drivers/infiniband/hw/i40iw/i40iw_ctrl.c

+3 −0
Original line number Diff line number Diff line
@@ -483,6 +483,9 @@ static enum i40iw_status_code i40iw_sc_cqp_init(struct i40iw_sc_cqp *cqp, 
	cqp->dev->cqp_cmd_stats[OP_REQUESTED_COMMANDS] = 0;

	cqp->dev->cqp_cmd_stats[OP_COMPLETED_COMMANDS] = 0;



	i40iw_wr32(cqp->dev->hw, I40E_PFPE_CQPTAIL, 0);

	i40iw_wr32(cqp->dev->hw, I40E_PFPE_CQPDB, 0);



	i40iw_debug(cqp->dev, I40IW_DEBUG_WQE,

		    "%s: sq_size[%04d] hw_sq_size[%04d] sq_base[%p] sq_pa[%llxh] cqp[%p] polarity[x%04X]\n",

		    __func__, cqp->sq_size, cqp->hw_sq_size,