netdev - [net-next 07/15] ixgbe: avoid duplicate code in suspend and stop paths

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Date:	Tue, 27 May 2014 02:12:23 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com,
	Jakub Kicinski <kubakici@...pl>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 07/15] ixgbe: avoid duplicate code in suspend and stop paths

From: Jacob Keller <jacob.e.keller@...el.com>

Resume path calls .open but suspend path cannot call .stop because
fdirs should not be freed and control over hardware should not be
released until WoL is configured.  To avoid having to duplicate all
changes made in .stop on suspend path split out part of .stop that
is relevant during suspend and call it from .stop and during suspend.

This fix also ensures that ixgbe_ptp_suspend is called during the
suspend path, and helps avoid similar errors. We can't call
ixgbe_ptp_stop, since it will free the PTP clock device, which we
shouldn't be doing during a suspend path.

Signed-off-by: Jakub Kicinski <kubakici@...pl>
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index cf9956a..ea11e2c 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5659,6 +5659,17 @@ err_setup_tx:
 	return err;
 }
 
+static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
+{
+	ixgbe_ptp_suspend(adapter);
+
+	ixgbe_down(adapter);
+	ixgbe_free_irq(adapter);
+
+	ixgbe_free_all_tx_resources(adapter);
+	ixgbe_free_all_rx_resources(adapter);
+}
+
 /**
  * ixgbe_close - Disables a network interface
  * @netdev: network interface device structure
@@ -5676,14 +5687,10 @@ static int ixgbe_close(struct net_device *netdev)
 
 	ixgbe_ptp_stop(adapter);
 
-	ixgbe_down(adapter);
-	ixgbe_free_irq(adapter);
+	ixgbe_close_suspend(adapter);
 
 	ixgbe_fdir_filter_exit(adapter);
 
-	ixgbe_free_all_tx_resources(adapter);
-	ixgbe_free_all_rx_resources(adapter);
-
 	ixgbe_release_hw_control(adapter);
 
 	return 0;
@@ -5750,12 +5757,8 @@ static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
 	netif_device_detach(netdev);
 
 	rtnl_lock();
-	if (netif_running(netdev)) {
-		ixgbe_down(adapter);
-		ixgbe_free_irq(adapter);
-		ixgbe_free_all_tx_resources(adapter);
-		ixgbe_free_all_rx_resources(adapter);
-	}
+	if (netif_running(netdev))
+		ixgbe_close_suspend(adapter);
 	rtnl_unlock();
 
 	ixgbe_clear_interrupt_scheme(adapter);
-- 
1.9.3

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