[dpdk-dev] [PATCH] net/ice/base: workaround for unexpected rule deletion

[Qi Zhang <qi.z.zhang@intel.com>]

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>
---
 drivers/net/ice/base/ice_switch.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ice/base/ice_switch.c b/drivers/net/ice/base/ice_switch.c
index 08999d336..b9fa516b0 100644
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -6438,6 +6438,13 @@ 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
-- 
2.13.6