diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 9285a68f435f..c14cdce588a7 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -293,16 +293,18 @@ static void airoha_fe_pse_ports_init(struct airoha_eth *eth)
 		[FE_PSE_PORT_GDM4] = 2,
 		[FE_PSE_PORT_CDM5] = 2,
 	};
-	u32 all_rsv;
 	int q;
 
-	all_rsv = airoha_fe_get_pse_all_rsv(eth);
 	if (airoha_ppe_is_enabled(eth, 1)) {
+		u32 all_rsv;
+
 		/* hw misses PPE2 oq rsv */
+		all_rsv = airoha_fe_get_pse_all_rsv(eth);
 		all_rsv += PSE_RSV_PAGES *
 			   pse_port_num_queues[FE_PSE_PORT_PPE2];
+		airoha_fe_rmw(eth, REG_FE_PSE_BUF_SET, PSE_ALLRSV_MASK,
+			      FIELD_PREP(PSE_ALLRSV_MASK, all_rsv));
 	}
-	airoha_fe_set(eth, REG_FE_PSE_BUF_SET, all_rsv);
 
 	/* CMD1 */
 	for (q = 0; q < pse_port_num_queues[FE_PSE_PORT_CDM1]; q++)