From: Shannon Nelson <shannon.nelson@oracle.com>
Date: Tue, 4 Sep 2018 12:33:29 -0700
Subject: ixgbevf: fix msglen for ipsec mbx messages
Patch-mainline: v4.20-rc1
Git-commit: 2c49d34f3b49812d4978a44b114b571fc421e2d0
References: bsc#1113994 FATE#326315 FATE#326317

Don't be fancy with message lengths, just set lengths to
number of dwords, not bytes.

Fixes: 0062e7cc955e ("ixgbevf: add VF IPsec offload code")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/ixgbevf/ipsec.c |   11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

--- a/drivers/net/ethernet/intel/ixgbevf/ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ipsec.c
@@ -21,7 +21,6 @@ static int ixgbevf_ipsec_set_pf_sa(struc
 	u32 msgbuf[IXGBE_VFMAILBOX_SIZE] = { 0 };
 	struct ixgbe_hw *hw = &adapter->hw;
 	struct sa_mbx_msg *sam;
-	u16 msglen;
 	int ret;
 
 	/* send the important bits to the PF */
@@ -38,16 +37,14 @@ static int ixgbevf_ipsec_set_pf_sa(struc
 	memcpy(sam->key, xs->aead->alg_key, sizeof(sam->key));
 
 	msgbuf[0] = IXGBE_VF_IPSEC_ADD;
-	msglen = sizeof(*sam) + sizeof(msgbuf[0]);
 
 	spin_lock_bh(&adapter->mbx_lock);
 
-	ret = hw->mbx.ops.write_posted(hw, msgbuf, msglen);
+	ret = hw->mbx.ops.write_posted(hw, msgbuf, IXGBE_VFMAILBOX_SIZE);
 	if (ret)
 		goto out;
 
-	msglen = sizeof(msgbuf[0]) * 2;
-	ret = hw->mbx.ops.read_posted(hw, msgbuf, msglen);
+	ret = hw->mbx.ops.read_posted(hw, msgbuf, 2);
 	if (ret)
 		goto out;
 
@@ -80,11 +77,11 @@ static int ixgbevf_ipsec_del_pf_sa(struc
 
 	spin_lock_bh(&adapter->mbx_lock);
 
-	err = hw->mbx.ops.write_posted(hw, msgbuf, sizeof(msgbuf));
+	err = hw->mbx.ops.write_posted(hw, msgbuf, 2);
 	if (err)
 		goto out;
 
-	err = hw->mbx.ops.read_posted(hw, msgbuf, sizeof(msgbuf));
+	err = hw->mbx.ops.read_posted(hw, msgbuf, 2);
 	if (err)
 		goto out;