net/ice/base: fix duplicate flow rules

[ upstream commit 43d3025 ]

When a vsi that already exists in the created vsi_list subscribes to the
same filter again, the return value ICE_SUCCESS results in duplicate flow
rules to be stored, which will cause 'flush' and 'destroy' errors.

Fixes: fed0c5c ("net/ice/base: support programming a new switch recipe")

Signed-off-by: Yiding Zhou <yidingx.zhou@intel.com>
Tested-by: Ke Xu <ke1.xu@intel.com>

drivers/net/ice/base/ice_switch.c

@@ -8805,7 +8805,7 @@ ice_adv_add_update_vsi_list(struct ice_hw *hw,
 
 		/* A rule already exists with the new VSI being added */
 		if (ice_is_bit_set(m_entry->vsi_list_info->vsi_map, vsi_handle))
-			return ICE_SUCCESS;
+			return ICE_ERR_ALREADY_EXISTS;
 
 		/* Update the previously created VSI list set with
 		 * the new VSI ID passed in