[Intel-wired-lan] [PATCH net v1] iavf: Fix handling of vlan strip virtual channel messages

[Nguyen, Anthony L]

On Tue, 2021-10-12 at 13:04 +0000, Michal Maloszewski wrote:
> Modify netdev->features for vlan stripping based on virtual
> channel messages received from the PF. Change is needed
> to synchronize vlan strip status between PF sysfs and iavf ethtool.
> 
> Fixes: 54a4f0239f2e ("KVM: MMU: make kvm_mmu_zap_page() return the
> number of pages it actually freed")

I don't see the relation between this patch and the Fixes. If I'm
missing something, can you explain?

> Signed-off-by: Norbert Ciosek <norbertx.ciosek at intel.com>
> Signed-off-by: Michal Maloszewski <michal.maloszewski at intel.com>
> ---
> v2: commit message and comments corrected

Your title has v1, but there's a v2 here?

>     note that splitting lines is necessary because the number of
> allowable characters on the line is exceeded

Strings are not part of the character limit rule. If you run
checkpatch, you will notice nothing is reported.

Also, please run checkpatch on your patches:

CHECK: Alignment should match open parenthesis
#112: FILE: drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1467:
+static void iavf_netdev_features_vlan_strip_set(struct net_device
*netdev,
+                                              const bool enable)

WARNING: suspect code indent for conditional statements (8, 13)
#114: FILE: drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1469:
+       if (enable)
+            netdev->features |= NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_RX;

WARNING: suspect code indent for conditional statements (8, 13)
#116: FILE: drivers/net/ethernet/intel/iavf/iavf_virtchnl.c:1471:
+       else
+            netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX &
~NETIF_F_HW_VLAN_RX;

This also still does not apply. Are you using the correct tree?
rebasing?

> ---
>  .../net/ethernet/intel/iavf/iavf_virtchnl.c   | 44
> ++++++++++++++++++-
>  1 file changed, 43 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
> b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
> index 9c128462ed..68761b92f6 100644
> --- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
> +++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c
> @@ -1456,6 +1456,22 @@ void iavf_request_reset(struct iavf_adapter
> *adapter)
>         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
>  }
>  
> +/**
> + * iavf_netdev_features_vlan_strip_set
> + * @netdev: ptr to netdev being adjusted
> + * @enable: enable or disable vlan strip
> + *
> + * Helper function to change vlan strip status in netdev->features.
> + **/
> +static void iavf_netdev_features_vlan_strip_set(struct net_device
> *netdev,
> +                                              const bool enable)
> +{
> +       if (enable)
> +            netdev->features |= NETIF_F_HW_VLAN_CTAG_RX |
> NETIF_F_HW_VLAN_RX;
> +       else
> +            netdev->features &= ~NETIF_F_HW_VLAN_CTAG_RX &
> ~NETIF_F_HW_VLAN_RX;
> +}
> +
>  /**
>   * iavf_virtchnl_completion
>   * @adapter: adapter structure
> @@ -1679,8 +1695,20 @@ void iavf_virtchnl_completion(struct
> iavf_adapter *adapter,
>                         }
>                         break;
>                 case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
> +                       dev_warn(&adapter->pdev->dev,
> +                                "Changing VLAN Stripping is not
> allowed when Port VLAN is configured\n");
> +                       /*Vlan stripping could not be enabled by
> ethtool.
> +                        * Disable it in netdev->features.
> +                        */
> +                       iavf_netdev_features_vlan_strip_set(netdev,
> false);
> +                       break;
>                 case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
> -                       dev_warn(&adapter->pdev->dev, "Changing VLAN
> Stripping is not allowed when Port VLAN is configured\n");
> +                       dev_warn(&adapter->pdev->dev,
> +                                "Changing VLAN Stripping is not
> allowed when Port VLAN is configured\n");
> +                       /*Vlan stripping could not be disabled by
> ethtool.
> +                        * Enable it in netdev->features.
> +                        */
> +                       iavf_netdev_features_vlan_strip_set(netdev,
> true);
>                         break;
>                 default:
>                         dev_err(&adapter->pdev->dev, "PF returned
> error %d (%s) to our request %d\n",
> @@ -1897,6 +1925,20 @@ void iavf_virtchnl_completion(struct
> iavf_adapter *adapter,
>                 spin_unlock_bh(&adapter->adv_rss_lock);
>                 }
>                 break;
> +       case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
> +               /*Got information that PF enabled vlan strip on this
> VF.
> +                * Update netdev->features if needed to be in sync
> with ethtool.
> +                */
> +               if (!v_retval)
> +                       iavf_netdev_features_vlan_strip_set(netdev,
> true);
> +               break;
> +       case VIRTCHNL_OP_DISABLE_VLAN_STRIPPING:
> +               /* Got information that PF disabled vlan strip on
> this VF.
> +                * Update netdev->features if needed to be in sync
> with ethtool.
> +                */
> +               if (!v_retval)
> +                       iavf_netdev_features_vlan_strip_set(netdev,
> false);
> +               break;
>         default:
>                 if (adapter->current_op && (v_opcode != adapter-
> >current_op))
>                         dev_dbg(&adapter->pdev->dev, "Expected
> response %d from PF, received %d\n",