From: Christopher Bednarz <christopher.n.bednarz@intel.com>
Date: Mon, 16 Oct 2017 15:46:03 -0500
Subject: i40iw: Clear CQP Head/Tail during initialization
Patch-mainline: v4.15-rc1
Git-commit: 56b2f52310f9fdfc1ea7b99702f827f84ad16801
References: bsc#1058659 FATE#322535
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: 86dbcd0f12e9 ("i40iw: add file to handle cqp calls")
Signed-off-by: Christopher Bednarz <christopher.n.bednarz@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/i40iw/i40iw_ctrl.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
@@ -480,6 +480,9 @@ static enum i40iw_status_code i40iw_sc_c
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,