Commit 82187f42c014 for kernel

commit 82187f42c014d22520b9c3c4e2cfb519223fb29b
Author: Maxime Chevallier <maxime.chevallier@bootlin.com>
Date:   Wed Aug 26 16:04:55 2026 +0200

    net: stmmac: dwmac4: Account for the primary MAC address for UC filtering

    The same filter slots are used to store the main MAC address as well as
    the address for the unicast filter. Let's account for that when deciding
    whether or not to use promisc when programming the UC list in hardware.

    Fixes: 477286b53f55 ("stmmac: add GMAC4 core support")
    Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
    Reviewed-by: Andrew Lunn <andrew@lunn.ch>
    Link: https://patch.msgid.link/20260826140500.616466-4-maxime.chevallier@bootlin.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index c6fcfae27c3d..18b357b257cc 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -521,7 +521,7 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
 	value |= GMAC_PACKET_FILTER_HPF;

 	/* Handle multiple unicast addresses */
-	if (netdev_uc_count(dev) > hw->unicast_filter_entries) {
+	if (netdev_uc_count(dev) + 1 > hw->unicast_filter_entries) {
 		/* Switch to promiscuous mode if more than 128 addrs
 		 * are required
 		 */