igc: Complete to commit Add basic skeleton for PTP

commit 5f2958052c58 ("igc: Add basic skeleton for PTP") added basic
support for PTP, what's missing is support for suspending.
Legacy power management has been added. Now we can add
the suspend method to the igc_shutdown.
By cleaning the runtime storage for timestamp this avoids a possible
invalid memory access when the system comes back from suspend state.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h
index cb13621..5e9c2dd 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc.h
+++ b/drivers/net/ethernet/intel/igc/igc.h
@@ -556,6 +556,7 @@ int igc_erase_filter(struct igc_adapter *adapter,
 
 void igc_ptp_init(struct igc_adapter *adapter);
 void igc_ptp_reset(struct igc_adapter *adapter);
+void igc_ptp_suspend(struct igc_adapter *adapter);
 void igc_ptp_stop(struct igc_adapter *adapter);
 void igc_ptp_rx_rgtstamp(struct igc_q_vector *q_vector, struct sk_buff *skb);
 void igc_ptp_rx_pktstamp(struct igc_q_vector *q_vector, void *va,

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 3c748d2..b805323 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -4899,6 +4899,8 @@ static int __igc_shutdown(struct pci_dev *pdev, bool *enable_wake,
        if (netif_running(netdev))
                __igc_close(netdev, true);
 
+       igc_ptp_suspend(adapter);
+
        igc_clear_interrupt_scheme(adapter);
        rtnl_unlock();
 

diff --git a/drivers/net/ethernet/intel/igc/igc_ptp.c b/drivers/net/ethernet/intel/igc/igc_ptp.c
index 389a969..f99c514 100644 (file)
--- a/drivers/net/ethernet/intel/igc/igc_ptp.c
+++ b/drivers/net/ethernet/intel/igc/igc_ptp.c
@@ -641,7 +641,7 @@ void igc_ptp_init(struct igc_adapter *adapter)
  * This function stops the overflow check work and PTP Tx timestamp work, and
  * will prepare the device for OS suspend.
  */
-static void igc_ptp_suspend(struct igc_adapter *adapter)
+void igc_ptp_suspend(struct igc_adapter *adapter)
 {
        if (!(adapter->ptp_flags & IGC_PTP_ENABLED))
                return;