linux-kernel - [PATCH net v2] i40e: Fix I40E_FLAG_VF_VLAN

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Date:   Thu, 19 Oct 2023 18:37:20 +0200
From:   Ivan Vecera <ivecera@...hat.com>
To:     netdev@...r.kernel.org
Cc:     Mateusz Palczewski <mateusz.palczewski@...el.com>,
        Simon Horman <horms@...nel.org>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Przemyslaw Patynowski <przemyslawx.patynowski@...el.com>,
        Sylwester Dziedziuch <sylwesterx.dziedziuch@...el.com>,
        intel-wired-lan@...ts.osuosl.org (moderated list:INTEL ETHERNET DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH net v2] i40e: Fix I40E_FLAG_VF_VLAN_PRUNING value

Commit c87c938f62d8f1 ("i40e: Add VF VLAN pruning") added new
PF flag I40E_FLAG_VF_VLAN_PRUNING but its value collides with
existing I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENABLED flag.

Move the affected flag at the end of the flags and fix its value.

Reproducer:
[root@...-03 ~]# ethtool --set-priv-flags enp2s0f0np0 link-down-on-close on
[root@...-03 ~]# ethtool --set-priv-flags enp2s0f0np0 vf-vlan-pruning on
[root@...-03 ~]# ethtool --set-priv-flags enp2s0f0np0 link-down-on-close off
[ 6323.142585] i40e 0000:02:00.0: Setting link-down-on-close not supported on this port (because total-port-shutdown is enabled)
netlink error: Operation not supported
[root@...-03 ~]# ethtool --set-priv-flags enp2s0f0np0 vf-vlan-pruning off
[root@...-03 ~]# ethtool --set-priv-flags enp2s0f0np0 link-down-on-close off

The link-down-on-close flag cannot be modified after setting vf-vlan-pruning
because vf-vlan-pruning shares the same bit with total-port-shutdown flag
that prevents any modification of link-down-on-close flag.

Fixes: c87c938f62d8 ("i40e: Add VF VLAN pruning")
Cc: Mateusz Palczewski <mateusz.palczewski@...el.com>
Cc: Simon Horman <horms@...nel.org>
Signed-off-by: Ivan Vecera <ivecera@...hat.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 6e310a53946782..55bb0b5310d5b4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -580,7 +580,6 @@ struct i40e_pf {
 #define I40E_FLAG_DISABLE_FW_LLDP		BIT(24)
 #define I40E_FLAG_RS_FEC			BIT(25)
 #define I40E_FLAG_BASE_R_FEC			BIT(26)
-#define I40E_FLAG_VF_VLAN_PRUNING		BIT(27)
 /* TOTAL_PORT_SHUTDOWN
  * Allows to physically disable the link on the NIC's port.
  * If enabled, (after link down request from the OS)
@@ -603,6 +602,7 @@ struct i40e_pf {
  *   in abilities field of i40e_aq_set_phy_config structure
  */
 #define I40E_FLAG_TOTAL_PORT_SHUTDOWN_ENABLED	BIT(27)
+#define I40E_FLAG_VF_VLAN_PRUNING		BIT(28)
 
 	struct i40e_client_instance *cinst;
 	bool stat_offsets_loaded;
-- 
2.41.0