netdev - [net-next 06/14] i40evf: resend FW request if no response

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Message-Id: <1403784834-23301-7-git-send-email-jeffrey.t.kirsher@intel.com>
Date:	Thu, 26 Jun 2014 05:13:45 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Mitch Williams <mitch.a.williams@...el.com>,
	netdev@...r.kernel.org, gospo@...hat.com, sassmann@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 06/14] i40evf: resend FW request if no response

From: Mitch Williams <mitch.a.williams@...el.com>

Sometimes the firmware will not indicate an error but fail to pass a
message between the VF and the PF driver. If this happens, just resend
the request.

This fixes an initialization failure if many VFs are instantiated at the
same time and the VF module is autoloaded.

Change-ID: Idd1ad8da2fd5137859244685c355941427d317d7
Signed-off-by: Mitch Williams <mitch.a.williams@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40evf/i40evf_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 7138ab4..8082a9f 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -2018,6 +2018,10 @@ static void i40evf_init_task(struct work_struct *work)
 		if (err) {
 			dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
 				err);
+			if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
+				dev_info(&pdev->dev, "Resending request\n");
+				err = i40evf_send_api_ver(adapter);
+			}
 			goto err;
 		}
 		err = i40evf_send_vf_config_msg(adapter);
-- 
1.9.3

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