i40e: change log messages and error returns

When VFs are being reset, there is a brief window of time when they
cannot be configured because they don't have a VSI to configure. If
a script is quick, it can fall through that window. To avoid
defenestration, log a useful error message and return -EAGAIN.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index aa58a49..b8deb50 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2078,9 +2078,9 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
        vf = &(pf->vf[vf_id]);
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
-               dev_err(&pf->pdev->dev,
-                       "Uninitialized VF %d\n", vf_id);
-               ret = -EINVAL;
+               dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
+                       vf_id);
+               ret = -EAGAIN;
                goto error_param;
        }
 
@@ -2162,8 +2162,9 @@ int i40e_ndo_set_vf_port_vlan(struct net_device *netdev,
        vf = &(pf->vf[vf_id]);
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
-               dev_err(&pf->pdev->dev, "Uninitialized VF %d\n", vf_id);
-               ret = -EINVAL;
+               dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
+                       vf_id);
+               ret = -EAGAIN;
                goto error_pvid;
        }
 
@@ -2282,8 +2283,9 @@ int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int min_tx_rate,
        vf = &(pf->vf[vf_id]);
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
-               dev_err(&pf->pdev->dev, "Uninitialized VF %d.\n", vf_id);
-               ret = -EINVAL;
+               dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
+                       vf_id);
+               ret = -EAGAIN;
                goto error;
        }
 
@@ -2356,8 +2358,9 @@ int i40e_ndo_get_vf_config(struct net_device *netdev,
        /* first vsi is always the LAN vsi */
        vsi = pf->vsi[vf->lan_vsi_idx];
        if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
-               dev_err(&pf->pdev->dev, "Uninitialized VF %d\n", vf_id);
-               ret = -EINVAL;
+               dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
+                       vf_id);
+               ret = -EAGAIN;
                goto error_param;
        }
 
@@ -2472,6 +2475,12 @@ int i40e_ndo_set_vf_spoofchk(struct net_device *netdev, int vf_id, bool enable)
        }
 
        vf = &(pf->vf[vf_id]);
+       if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
+               dev_err(&pf->pdev->dev, "VF %d still in reset. Try again.\n",
+                       vf_id);
+               ret = -EAGAIN;
+               goto out;
+       }
 
        if (enable == vf->spoofchk)
                goto out;