USB: gadget: Add EEM gadget driver
This patch adds a CDC EEM ethernet gadget driver. CDC EEM is a newer
USB ethernet specification that uses a simpler interface than the older
CDC ECM. This makes CDC EEM usable by a wider set of USB hardware.
By default the ethernet gadget will still use CDC ECM/Subset, but kernel
configuration and/or a module parameter will allow alternative use of
the CDC EEM protocol.
Changes since last version:
- Brought in missing RNDIS changes that caused compile error
- Modified 'sentinel CRC' checking to match EEM host driver
Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c
index 424a37c..c9966cc 100644
--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -286,12 +286,17 @@
/*-------------------------------------------------------------------------*/
-static struct sk_buff *rndis_add_header(struct sk_buff *skb)
+static struct sk_buff *rndis_add_header(struct gether *port,
+ struct sk_buff *skb)
{
- skb = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
- if (skb)
- rndis_add_hdr(skb);
- return skb;
+ struct sk_buff *skb2;
+
+ skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
+ if (skb2)
+ rndis_add_hdr(skb2);
+
+ dev_kfree_skb_any(skb);
+ return skb2;
}
static void rndis_response_available(void *_rndis)