HSD #16027944589: net: stmmac: Reset residual action set in L3L4 filters

When deleting an L3/L4 flower filter entry, the action field
is not being reset. So if a filter was previously configured
with a drop action, that action may persist and affect
subsequent configurations unintentionally. This commit
ensures action field is cleared when the filter is deleted.

Fixes: 425eabd ("net: stmmac: Implement L3/L4 Filters using TC Flower")
Signed-off-by: Rohan G Thomas <[email protected]>

Author: rohangt07

drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c

@@ -701,6 +701,7 @@ static int tc_del_flow(struct stmmac_priv *priv,
 	entry->in_use = false;
 	entry->cookie = 0;
 	entry->is_l4 = false;
+	entry->action = 0;
 	return ret;
 }