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usb: gadget: Add variant of gether_setup to customize the device name

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This is needed to avoid name collisions on SoCs that have both usb
gadget and usb host, where usb0 may be the rndis interface or a usb
ethernet adapter.

Signed-off-by: Mike Lockwood <lockwood@android.com>
Signed-off-by: Benoit Goby <benoit@android.com>
	[make gether_setup a static inline function]
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Lockwood 2012-05-10 10:08:02 +02:00 committed by Greg Kroah-Hartman
parent c3c04b2945
commit 036e98b216
2 changed files with 25 additions and 4 deletions
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8
drivers/usb/gadget/u_ether.c
View File

@ -744,10 +744,11 @@ static struct device_type gadget_type = {
};
/**
* gether_setup - initialize one ethernet-over-usb link
* gether_setup_name - initialize one ethernet-over-usb link
* @g: gadget to associated with these links
* @ethaddr: NULL, or a buffer in which the ethernet address of the
* host side of the link is recorded
* @netname: name for network device (for example, "usb")
* Context: may sleep
*
* This sets up the single network link that may be exported by a
@ -756,7 +757,8 @@ static struct device_type gadget_type = {
*
* Returns negative errno, or zero on success
*/
int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN])
int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
const char *netname)
{
struct eth_dev *dev;
struct net_device *net;
@ -780,7 +782,7 @@ int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN])
/* network device setup */
dev->net = net;
strcpy(net->name, "usb%d");
snprintf(net->name, sizeof(net->name), "%s%%d", netname);
if (get_ether_addr(dev_addr, net->dev_addr))
dev_warn(&g->dev,

21
drivers/usb/gadget/u_ether.h
View File

@ -69,9 +69,28 @@ struct gether {
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|USB_CDC_PACKET_TYPE_DIRECTED)
/* variant of gether_setup that allows customizing network device name */
int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
const char *netname);
/* netdev setup/teardown as directed by the gadget driver */
int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]);
/* gether_setup - initialize one ethernet-over-usb link
* @g: gadget to associated with these links
* @ethaddr: NULL, or a buffer in which the ethernet address of the
* host side of the link is recorded
* Context: may sleep
*
* This sets up the single network link that may be exported by a
* gadget driver using this framework. The link layer addresses are
* set up using module parameters.
*
* Returns negative errno, or zero on success
*/
static inline int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN])
{
return gether_setup_name(g, ethaddr, "usb");
}
void gether_cleanup(void);
/* connect/disconnect is handled by individual functions */