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usbnet: ipheth: transmit URBs without trailing padding 

The behaviour of the official iOS tethering driver on macOS is to not
transmit any trailing padding at the end of URBs. This is applicable
to both NCM and legacy modes, including older devices.

Adapt the driver to not include trailing padding in TX URBs, matching
the behaviour of the official macOS driver.

Signed-off-by: Foster Snowhill <forst@pen.gy>
Tested-by: Georgi Valkov <gvalkov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Foster Snowhill 2023-06-07 15:57:00 +02:00 committed by David S. Miller
parent 2203718c2f
commit 3e65efcca8
1 changed files with 1 additions and 3 deletions
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4
drivers/net/usb/ipheth.c
View File

@ -373,12 +373,10 @@ static netdev_tx_t ipheth_tx(struct sk_buff *skb, struct net_device *net)
}
memcpy(dev->tx_buf, skb->data, skb->len);
if (skb->len < IPHETH_BUF_SIZE)
memset(dev->tx_buf + skb->len, 0, IPHETH_BUF_SIZE - skb->len);
usb_fill_bulk_urb(dev->tx_urb, udev,
usb_sndbulkpipe(udev, dev->bulk_out),
dev->tx_buf, IPHETH_BUF_SIZE,
dev->tx_buf, skb->len,
ipheth_sndbulk_callback,
dev);
dev->tx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;