i40e: Fix adding ADQ filter to TC0

[ Upstream commit c3238d36c3a2be0a29a9d848d6c51e1b14be6692 ]

Procedure of configure tc flower filters erroneously allows to create
filters on TC0 where unfiltered packets are also directed by default.
Issue was caused by insufficient checks of hw_tc parameter specifying
the hardware traffic class to pass matching packets to.

Fix checking hw_tc parameter which blocks creation of filters on TC0.

Fixes: 2f4b411a3d67 ("i40e: Enable cloud filters via tc-flower")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@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/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 29387f0814e9bceac7ce39dd4247afae12869661..9bc05d671ad5f4dac257996b413ad8218f945b22 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8523,6 +8523,11 @@ static int i40e_configure_clsflower(struct i40e_vsi *vsi,
                return -EOPNOTSUPP;
        }
 
+       if (!tc) {
+               dev_err(&pf->pdev->dev, "Unable to add filter because of invalid destination");
+               return -EINVAL;
+       }
+
        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state) ||
            test_bit(__I40E_RESET_INTR_RECEIVED, pf->state))
                return -EBUSY;