From: Tushar Dave <tushar.n.dave@oracle.com>
Date: Thu, 22 Jun 2017 09:44:32 -0700
Subject: i40evf: Use le32_to_cpu before evaluating HW desc fields
Patch-mainline: v4.14-rc1
Git-commit: c969ef4ed9cbf3662fc8709e2581427c191504fb
References: bsc#1056658 FATE#322188 bsc#1056662 FATE#322186
i40e hardware descriptor fields are in little-endian format. Driver
must use le32_to_cpu while evaluating these fields otherwise on
big-endian arch we end up evaluating incorrect values, cause errors
like:
i40evf 0000:03:0a.0: Expected response 24 from PF, received 402653184
i40evf 0000:03:0a.1: Expected response 7 from PF, received 117440512
Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Reviewed-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: Benjamin Poirier <bpoirier@suse.com>
---
drivers/net/ethernet/intel/i40evf/i40evf_main.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1957,8 +1957,8 @@ static void i40evf_adminq_task(struct wo
container_of(work, struct i40evf_adapter, adminq_task);
struct i40e_hw *hw = &adapter->hw;
struct i40e_arq_event_info event;
- struct virtchnl_msg *v_msg;
- i40e_status ret;
+ enum virtchnl_ops v_op;
+ i40e_status ret, v_ret;
u32 val, oldval;
u16 pending;
@@ -1970,15 +1970,15 @@ static void i40evf_adminq_task(struct wo
if (!event.msg_buf)
goto out;
- v_msg = (struct virtchnl_msg *)&event.desc;
do {
ret = i40evf_clean_arq_element(hw, &event, &pending);
- if (ret || !v_msg->v_opcode)
+ v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
+ v_ret = (i40e_status)le32_to_cpu(event.desc.cookie_low);
+
+ if (ret || !v_op)
break; /* No event to process or error cleaning ARQ */
- i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
- (i40e_status)v_msg->v_retval,
- event.msg_buf,
+ i40evf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
event.msg_len);
if (pending != 0)
memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);