netdev - [PATCH iwl-net] ice: Fix VLAN pruning in switchdev mode

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Message-ID: <20241104184908.632863-2-marcin.szycik@linux.intel.com>
Date: Mon,  4 Nov 2024 19:49:09 +0100
From: Marcin Szycik <marcin.szycik@...ux.intel.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	Marcin Szycik <marcin.szycik@...ux.intel.com>,
	Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Subject: [PATCH iwl-net] ice: Fix VLAN pruning in switchdev mode

In switchdev mode the uplink VSI should receive all unmatched packets,
including VLANs. Therefore, VLAN pruning should be disabled if uplink is
in switchdev mode. It is already being done in ice_eswitch_setup_env(),
however the addition of ice_up() in commit 44ba608db509 ("ice: do
switchdev slow-path Rx using PF VSI") caused VLAN pruning to be
re-enabled after disabling it.

Add a check to ice_set_vlan_filtering_features() to ensure VLAN
filtering will not be enabled if uplink is in switchdev mode. Note that
ice_is_eswitch_mode_switchdev() is being used instead of
ice_is_switchdev_running(), as the latter would only return true after
the whole switchdev setup completes.

Fixes: 44ba608db509 ("ice: do switchdev slow-path Rx using PF VSI")
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Signed-off-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index b1e7727b8677..8f2e758c3942 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -6361,10 +6361,12 @@ ice_set_vlan_filtering_features(struct ice_vsi *vsi, netdev_features_t features)
 	int err = 0;
 
 	/* support Single VLAN Mode (SVM) and Double VLAN Mode (DVM) by checking
-	 * if either bit is set
+	 * if either bit is set. In switchdev mode Rx filtering should never be
+	 * enabled.
 	 */
-	if (features &
-	    (NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER))
+	if ((features &
+	     (NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)) &&
+	     !ice_is_eswitch_mode_switchdev(vsi->back))
 		err = vlan_ops->ena_rx_filtering(vsi);
 	else
 		err = vlan_ops->dis_rx_filtering(vsi);
-- 
2.45.0