usbnet: smsc95xx: fix rx packet alignment

BugLink: https://bugs.launchpad.net/bugs/1837664
[ Upstream commit 810eeb1f41a9a272eedc94ca18c072e75678ede4 ]

The smsc95xx driver already takes into account the NET_IP_ALIGN
parameter when setting up the receive packet data, which means
we do not need to worry about aligning the packets in the usbnet
driver.

Adding the EVENT_NO_IP_ALIGN means that the IPv4 header is now
passed to the ip_rcv() routine with the start on an aligned address.

Tested on Raspberry Pi B3.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 2f65975a121f0c435c4d9e610685e2db0f22f7fe..fc48da1c702d7bab7627ea804c50ff52345184c7 100644 (file)
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1295,6 +1295,7 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
                dev->net->features |= NETIF_F_RXCSUM;
 
        dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
+       set_bit(EVENT_NO_IP_ALIGN, &dev->flags);
 
        smsc95xx_init_mac_address(dev);