ice: Don't tx before switchdev is fully configured

[ Upstream commit 7aa529a69e92b9aff585e569d5003f7c15d8d60b ]

There is possibility that ice_eswitch_port_start_xmit might be
called while some resources are still not allocated which might
cause NULL pointer dereference. Fix this by checking if switchdev
configuration was finished.

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
index 2ffe570..7de4a8a 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
@@ -361,6 +361,9 @@ ice_eswitch_port_start_xmit(struct sk_buff *skb, struct net_device *netdev)
        np = netdev_priv(netdev);
        vsi = np->vsi;
 
+       if (!vsi || !ice_is_switchdev_running(vsi->back))
+               return NETDEV_TX_BUSY;
+
        if (ice_is_reset_in_progress(vsi->back->state) ||
            test_bit(ICE_VF_DIS, vsi->back->state))
                return NETDEV_TX_BUSY;