i40e: check for netdev before debugfs use

Make sure the VSI has a netdev before trying to use it
in the debugfs netdev_ops commands.

Change-ID: I2d744fc0c32b3226534ce2cde171d9675c5440a6
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 22 insertions, 13 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index afd43d7973fa..3c37386fd138 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -2087,9 +2087,13 @@ static ssize_t i40e_dbg_netdev_ops_write(struct file *filp,
                 if (!vsi) {
                         dev_info(&pf->pdev->dev,
                                  "tx_timeout: VSI %d not found\n", vsi_seid);
-                        goto netdev_ops_write_done;
-                }
-                if (rtnl_trylock()) {
+                } else if (!vsi->netdev) {
+                        dev_info(&pf->pdev->dev, "tx_timeout: no netdev for VSI %d\n",
+                                 vsi_seid);
+                } else if (test_bit(__I40E_DOWN, &vsi->state)) {
+                        dev_info(&pf->pdev->dev, "tx_timeout: VSI %d not UP\n",
+                                 vsi_seid);
+                } else if (rtnl_trylock()) {
                         vsi->netdev->netdev_ops->ndo_tx_timeout(vsi->netdev);
                         rtnl_unlock();
                         dev_info(&pf->pdev->dev, "tx_timeout called\n");
@@ -2108,9 +2112,10 @@ static ssize_t i40e_dbg_netdev_ops_write(struct file *filp,
                 if (!vsi) {
                         dev_info(&pf->pdev->dev,
                                  "change_mtu: VSI %d not found\n", vsi_seid);
-                        goto netdev_ops_write_done;
-                }
-                if (rtnl_trylock()) {
+                } else if (!vsi->netdev) {
+                        dev_info(&pf->pdev->dev, "change_mtu: no netdev for VSI %d\n",
+                                 vsi_seid);
+                } else if (rtnl_trylock()) {
                         vsi->netdev->netdev_ops->ndo_change_mtu(vsi->netdev,
                                                                 mtu);
                         rtnl_unlock();
@@ -2129,9 +2134,10 @@ static ssize_t i40e_dbg_netdev_ops_write(struct file *filp,
                 if (!vsi) {
                         dev_info(&pf->pdev->dev,
                                  "set_rx_mode: VSI %d not found\n", vsi_seid);
-                        goto netdev_ops_write_done;
-                }
-                if (rtnl_trylock()) {
+                } else if (!vsi->netdev) {
+                        dev_info(&pf->pdev->dev, "set_rx_mode: no netdev for VSI %d\n",
+                                 vsi_seid);
+                } else if (rtnl_trylock()) {
                         vsi->netdev->netdev_ops->ndo_set_rx_mode(vsi->netdev);
                         rtnl_unlock();
                         dev_info(&pf->pdev->dev, "set_rx_mode called\n");
@@ -2149,11 +2155,14 @@ static ssize_t i40e_dbg_netdev_ops_write(struct file *filp,
                 if (!vsi) {
                         dev_info(&pf->pdev->dev, "napi: VSI %d not found\n",
                                  vsi_seid);
-                        goto netdev_ops_write_done;
+                } else if (!vsi->netdev) {
+                        dev_info(&pf->pdev->dev, "napi: no netdev for VSI %d\n",
+                                 vsi_seid);
+                } else {
+                        for (i = 0; i < vsi->num_q_vectors; i++)
+                                napi_schedule(&vsi->q_vectors[i]->napi);
+                        dev_info(&pf->pdev->dev, "napi called\n");
                 }
-                for (i = 0; i < vsi->num_q_vectors; i++)
-                        napi_schedule(&vsi->q_vectors[i]->napi);
-                dev_info(&pf->pdev->dev, "napi called\n");
         } else {
                 dev_info(&pf->pdev->dev, "unknown command '%s'\n",
                          i40e_dbg_netdev_ops_buf);