# \[PATCH net-next v20 08/13\] ax88179\_178a: Add AX179A/AX279 multicast configuration

- From: Birger Koblitz \<hidden\>
- Date: 2026-11-06 07:21:41 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/11/17876250
- Thread: https://ratatoskr.run/linux-usb/2026/11/17876248/t.md

```text
Add support for conditionally setting the ip_alignement flag
AX_RX_CTL_IPE in AX_RX_CTL and make sure that AX_RX_CTL_DROPCRCERR
is also set to be consistent with the initial configuration in
ax88179_reset()

Signed-off-by: Birger Koblitz <redacted>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 drivers/net/usb/ax88179_lib.c      | 16 +++++++++++-----
 drivers/net/usb/ax88179a_devices.c |  1 +
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/ax88179_lib.c b/drivers/net/usb/ax88179_lib.c
index a314db4c9766679568a036f98acf868784835865..b4b00c8b4b62320471e13ae34a1fed5d02e80441 100644
--- a/drivers/net/usb/ax88179_lib.c
+++ b/drivers/net/usb/ax88179_lib.c
@@ -321,16 +321,21 @@ int ax88179_set_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom, u8
 void ax88179_set_multicast(struct net_device *net)
 {
 	struct usbnet *dev = netdev_priv(net);
-	struct ax88179_data *data = dev->driver_priv;
 	u8 *m_filter = ((u8 *)dev->data);
+	struct ax88179_data *data;
+	u16 rxctl = 0;
+
+	data = dev->driver_priv;
 
-	data->rxctl = (AX_RX_CTL_START | AX_RX_CTL_AB | AX_RX_CTL_IPE);
+	rxctl = (AX_RX_CTL_START | AX_RX_CTL_AB | AX_RX_CTL_DROPCRCERR);
+	if (data->ip_align)
+		rxctl |= AX_RX_CTL_IPE;
 
 	if (net->flags & IFF_PROMISC) {
-		data->rxctl |= AX_RX_CTL_PRO;
+		rxctl |= AX_RX_CTL_PRO;
 	} else if (net->flags & IFF_ALLMULTI ||
 		   netdev_mc_count(net) > AX_MAX_MCAST) {
-		data->rxctl |= AX_RX_CTL_AMALL;
+		rxctl |= AX_RX_CTL_AMALL;
 	} else if (netdev_mc_empty(net)) {
 		/* just broadcast and directed */
 	} else {
@@ -351,9 +356,10 @@ void ax88179_set_multicast(struct net_device *net)
 					AX_MCAST_FLTSIZE, AX_MCAST_FLTSIZE,
 					m_filter);
 
-		data->rxctl |= AX_RX_CTL_AM;
+		rxctl |= AX_RX_CTL_AM;
 	}
 
+	WRITE_ONCE(data->rxctl, rxctl);
 	ax88179_write_cmd_async(dev, AX_ACCESS_MAC, AX_RX_CTL,
 				2, 2, &data->rxctl);
 }
diff --git a/drivers/net/usb/ax88179a_devices.c b/drivers/net/usb/ax88179a_devices.c
index 4207d2cc2b865e5780b3c7f5ba2645a6242df477..a6b0a3f47118c46db38d483792c083510aa2641a 100644
--- a/drivers/net/usb/ax88179a_devices.c
+++ b/drivers/net/usb/ax88179a_devices.c
@@ -678,6 +678,7 @@ static const struct net_device_ops ax88179a_netdev_ops = {
 	.ndo_set_mac_address	= ax88179_set_mac_addr,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_eth_ioctl		= ax88179a_mii_ioctl,
+	.ndo_set_rx_mode	= ax88179_set_multicast,
 	.ndo_set_features	= ax88179a_set_features,
 	.ndo_vlan_rx_add_vid	= ax88179a_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= ax88179a_vlan_rx_kill_vid,

-- 
2.47.3

```