From: Maxime Chevallier Date: Wed, 26 Aug 2026 14:04:55 +0000 (+0200) Subject: net: stmmac: dwmac4: Account for the primary MAC address for UC filtering X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82187f42c014d22520b9c3c4e2cfb519223fb29b;p=linux 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 Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/20260826140500.616466-4-maxime.chevallier@bootlin.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index c6fcfae27c3d0..18b357b257cc0 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 */