net/ice/base: workaround unexpected rule deletion

Ideally a rule with "TO VSI LIST" action should not be deleted when one
of the VF reset happens. The correct action by kernel PF driver is to
remove the VSI of a reset VF from the VSI list, but this is not
implemented in kernel PF yet, so workaround is the DCF to prevent a
rule with "To VSI List" action happens.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>

diff --git a/drivers/net/ice/base/ice_switch.c b/drivers/net/ice/base/ice_switch.c
index e64b031..7e33df8 100644 (file)
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -6742,6 +6742,13 @@ ice_adv_add_update_vsi_list(struct ice_hw *hw,
             cur_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI_LIST))
                return ICE_ERR_NOT_IMPL;
 
+       /* Workaround fix for unexpected rule deletion by kernel PF
+        * during VF reset.
+        */
+       if (new_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI &&
+           cur_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI)
+               return ICE_ERR_NOT_IMPL;
+
        if (m_entry->vsi_count < 2 && !m_entry->vsi_list_info) {
                 /* Only one entry existed in the mapping and it was not already
                  * a part of a VSI list. So, create a VSI list with the old and