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authorPeter Korsgaard <jacmet@sunsite.dk>2007-06-27 02:48:15 -0400
committerJeff Garzik <jeff@garzik.org>2007-07-02 08:24:51 -0400
commit3e323f3e86196eec18d6959585aa3188d060c43b (patch)
treeecfd354c67ee0d44c811d696fe7371f7502e1b11 /drivers/net
parent23de559b8d3537f972f325e7e015c18aa2e4d987 (diff)
usbnet: Zero padding byte if there is tail room in skb
Usbnet adds a padding byte if a 0 byte USB packet would be sent. Zero padding byte if there is tail room in skb. Signed-of-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/usb/usbnet.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 5b16d9a1269a..a12f576391cf 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -953,11 +953,14 @@ static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
953 /* don't assume the hardware handles USB_ZERO_PACKET 953 /* don't assume the hardware handles USB_ZERO_PACKET
954 * NOTE: strictly conforming cdc-ether devices should expect 954 * NOTE: strictly conforming cdc-ether devices should expect
955 * the ZLP here, but ignore the one-byte packet. 955 * the ZLP here, but ignore the one-byte packet.
956 *
957 * FIXME zero that byte, if it doesn't require a new skb.
958 */ 956 */
959 if ((length % dev->maxpacket) == 0) 957 if ((length % dev->maxpacket) == 0) {
960 urb->transfer_buffer_length++; 958 urb->transfer_buffer_length++;
959 if (skb_tailroom(skb)) {
960 skb->data[skb->len] = 0;
961 __skb_put(skb, 1);
962 }
963 }
961 964
962 spin_lock_irqsave (&dev->txq.lock, flags); 965 spin_lock_irqsave (&dev->txq.lock, flags);
963 966