[PATCH AUTOSEL 4.14 029/170] usbnet: smsc95xx: fix rx packet alignment

Sasha Levin
2019-01-28T16:13:13Z

From: Ben Dooks <ben.dooks@codethink.co.uk>

[ 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>
---
drivers/net/usb/smsc95xx.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 2f65975a121f..fc48da1c702d 100644
--- 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);

--
2.19.1