[PATCH net] net: stmmac: reconfigure RX packet parser table in stmmac_hw_setup() after reset

[Lorenzo Bianconi]

The core software reset issued in stmmac_init_dma_engine() during
ndo_open() callback clears the MTL RX packet parser registers, but
stmmac_rxp_config() is only invoked from the cls_u32 add/delete paths.
After an ifdown/ifup cycle the hardware therefore runs with the default
all-pass table while priv->tc_entries still reports the filters as
installed. Re-apply the RX packet parser table from priv->tc_entries in
stmmac_hw_setup(), right after the software reset, so the filters are
restored when the interface is brought up again.

Fixes: 4dbbe8dde848 ("net: stmmac: Add support for U32 TC filter using Flexible RX Parser")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at oss.qualcomm.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index d576059c04df..24656b35350b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3676,6 +3676,14 @@ static int stmmac_hw_setup(struct net_device *dev)
 	/* Initialize MTL*/
 	stmmac_mtl_configuration(priv);
 
+	/* Apply the RX packet parser table */
+	if (priv->tc_entries) {
+		ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries,
+					priv->tc_entries_max);
+		if (ret)
+			return ret;
+	}
+
 	/* Initialize Safety Features */
 	stmmac_safety_feat_configuration(priv);
 

---
base-commit: 1376afc7660bad2a1a5ee0876898312a486cf8bd
change-id: 20260831-stmmac_tc_cls32_reconfigure-17bc5001829d

Best regards,
-- 
Lorenzo Bianconi <lorenzo.bianconi at oss.qualcomm.com>