cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine

Need to turn off  SGE RX/TX Callback Timers & interrupt in cxgb4vf PCI Shutdown
routine in order to prevent crashes during reboot/poweroff when traffic is
running.

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 14 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index f002af190a65..d8d28e82ade1 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -2876,24 +2876,24 @@ static void cxgb4vf_pci_shutdown(struct pci_dev *pdev)
         if (!adapter)
                 return;
 
-        /*
-         * Disable all Virtual Interfaces.  This will shut down the
+        /* Disable all Virtual Interfaces.  This will shut down the
          * delivery of all ingress packets into the chip for these
          * Virtual Interfaces.
          */
-        for_each_port(adapter, pidx) {
-                struct net_device *netdev;
-                struct port_info *pi;
-
-                if (!test_bit(pidx, &adapter->registered_device_map))
-                        continue;
-
-                netdev = adapter->port[pidx];
-                if (!netdev)
-                        continue;
+        for_each_port(adapter, pidx)
+                if (test_bit(pidx, &adapter->registered_device_map))
+                        unregister_netdev(adapter->port[pidx]);
 
-                pi = netdev_priv(netdev);
-                t4vf_enable_vi(adapter, pi->viid, false, false);
+        /* Free up all Queues which will prevent further DMA and
+         * Interrupts allowing various internal pathways to drain.
+         */
+        t4vf_sge_stop(adapter);
+        if (adapter->flags & USING_MSIX) {
+                pci_disable_msix(adapter->pdev);
+                adapter->flags &= ~USING_MSIX;
+        } else if (adapter->flags & USING_MSI) {
+                pci_disable_msi(adapter->pdev);
+                adapter->flags &= ~USING_MSI;
         }
 
         /*
@@ -2901,6 +2901,7 @@ static void cxgb4vf_pci_shutdown(struct pci_dev *pdev)
          * Interrupts allowing various internal pathways to drain.
          */
         t4vf_free_sge_resources(adapter);
+        pci_set_drvdata(pdev, NULL);
 }
 
 /*