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authorJamie Painter <jamie.painter@iname.com>2006-07-27 14:17:28 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-27 11:58:51 -0700
commita99c19492a801013fd25ce7bab1f0f65a328a4ba (patch)
treea88fd5e6c315817238ca3481c0804dfd73df820b
parent9c53761681497d598a31ed2f6b29b5b3480c49db (diff)
downloadop-kernel-dev-a99c19492a801013fd25ce7bab1f0f65a328a4ba.zip
op-kernel-dev-a99c19492a801013fd25ce7bab1f0f65a328a4ba.tar.gz
USB: usbnet - Add unlink_rx_urbs() call to allow for Jumbo Frames
Add usbnet_unlink_rx_urbs() which can be called by mini-drivers when they change their MTU such as for Jumbo Frame support. Signed-off-by: David Hollis <dhollis@davehollis.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/net/usbnet.c30
-rw-r--r--drivers/usb/net/usbnet.h1
2 files changed, 28 insertions, 3 deletions
diff --git a/drivers/usb/net/usbnet.c b/drivers/usb/net/usbnet.c
index 54183e1..17fc6ae 100644
--- a/drivers/usb/net/usbnet.c
+++ b/drivers/usb/net/usbnet.c
@@ -61,8 +61,11 @@
* let the USB host controller be busy for 5msec or more before an irq
* is required, under load. Jumbograms change the equation.
*/
-#define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
-#define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? 60 : 4)
+#define RX_MAX_QUEUE_MEMORY (60 * 1518)
+#define RX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
+ (RX_MAX_QUEUE_MEMORY/(dev)->rx_urb_size) : 4)
+#define TX_QLEN(dev) (((dev)->udev->speed == USB_SPEED_HIGH) ? \
+ (RX_MAX_QUEUE_MEMORY/(dev)->hard_mtu) : 4)
// reawaken network queue this soon after stopping; else watchdog barks
#define TX_TIMEOUT_JIFFIES (5*HZ)
@@ -227,13 +230,23 @@ static int usbnet_change_mtu (struct net_device *net, int new_mtu)
{
struct usbnet *dev = netdev_priv(net);
int ll_mtu = new_mtu + net->hard_header_len;
+ int old_hard_mtu = dev->hard_mtu;
+ int old_rx_urb_size = dev->rx_urb_size;
- if (new_mtu <= 0 || ll_mtu > dev->hard_mtu)
+ if (new_mtu <= 0)
return -EINVAL;
// no second zero-length packet read wanted after mtu-sized packets
if ((ll_mtu % dev->maxpacket) == 0)
return -EDOM;
net->mtu = new_mtu;
+
+ dev->hard_mtu = net->mtu + net->hard_header_len;
+ if (dev->rx_urb_size == old_hard_mtu) {
+ dev->rx_urb_size = dev->hard_mtu;
+ if (dev->rx_urb_size > old_rx_urb_size)
+ usbnet_unlink_rx_urbs(dev);
+ }
+
return 0;
}
@@ -521,6 +534,17 @@ static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
return count;
}
+// Flush all pending rx urbs
+// minidrivers may need to do this when the MTU changes
+
+void usbnet_unlink_rx_urbs(struct usbnet *dev)
+{
+ if (netif_running(dev->net)) {
+ (void) unlink_urbs (dev, &dev->rxq);
+ tasklet_schedule(&dev->bh);
+ }
+}
+EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs);
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/net/usbnet.h b/drivers/usb/net/usbnet.h
index 89fc495..c0746f0 100644
--- a/drivers/usb/net/usbnet.h
+++ b/drivers/usb/net/usbnet.h
@@ -166,6 +166,7 @@ struct skb_data { /* skb->cb is one of these */
extern int usbnet_get_endpoints(struct usbnet *, struct usb_interface *);
extern void usbnet_defer_kevent (struct usbnet *, int);
extern void usbnet_skb_return (struct usbnet *, struct sk_buff *);
+extern void usbnet_unlink_rx_urbs(struct usbnet *);
extern u32 usbnet_get_msglevel (struct net_device *);
extern void usbnet_set_msglevel (struct net_device *, u32);
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