ChangeSet 1.1318, 2003/05/29 22:44:25-07:00, david-b@pacbell.net

[PATCH] USB: ethernet "gadget", rx overflows happen

I tightened up rx overflow logic in the net2280 driver
a while back, and it broke MTU size packets in this
driver (host pads them out).  This patch accomodates it
by allocating a slightly larger buffer (almost 3*512).


 drivers/usb/gadget/ether.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)


diff -Nru a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
--- a/drivers/usb/gadget/ether.c	Fri May 30 11:35:07 2003
+++ b/drivers/usb/gadget/ether.c	Fri May 30 11:35:07 2003
@@ -76,6 +76,7 @@
 
 #define MIN_PACKET	sizeof(struct ethhdr)
 #define	MAX_PACKET	ETH_DATA_LEN	/* biggest packet we'll rx/tx */
+#define RX_EXTRA	20		/* guard against rx overflows */
 
 /* FIXME allow high speed jumbograms */
 
@@ -1226,7 +1227,7 @@
 	int			retval = 0;
 	size_t			size;
 
-	size = (sizeof (struct ethhdr) + dev->net.mtu);
+	size = (sizeof (struct ethhdr) + dev->net.mtu + RX_EXTRA);
 
 	if ((skb = alloc_skb (size, gfp_flags)) == 0) {
 		DEBUG (dev, "no rx skb\n");