[PATCH v2 4/9] usb/gadget: phonet: move global dev variable to its user

[Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>]

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 drivers/usb/gadget/f_phonet.c |   20 +++++++++++---------
 drivers/usb/gadget/nokia.c    |   14 +++++++++-----
 drivers/usb/gadget/u_phonet.h |    6 +++---
 3 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c
index e86763f..e79ee34 100644
--- a/drivers/usb/gadget/f_phonet.c
+++ b/drivers/usb/gadget/f_phonet.c
@@ -574,9 +574,8 @@ pn_unbind(struct usb_configuration *c, struct usb_function *f)
 
 /*-------------------------------------------------------------------------*/
 
-static struct net_device *dev;
-
-int __init phonet_bind_config(struct usb_configuration *c)
+int __init phonet_bind_config(struct usb_configuration *c,
+			      struct net_device *dev)
 {
 	struct f_phonet *fp;
 	int err, size;
@@ -601,16 +600,16 @@ int __init phonet_bind_config(struct usb_configuration *c)
 	return err;
 }
 
-int __init gphonet_setup(struct usb_gadget *gadget)
+struct net_device __init *gphonet_setup(struct usb_gadget *gadget)
 {
+	struct net_device *dev;
 	struct phonet_port *port;
 	int err;
 
 	/* Create net device */
-	BUG_ON(dev);
 	dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup);
 	if (!dev)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	port = netdev_priv(dev);
 	spin_lock_init(&port->lock);
@@ -618,12 +617,15 @@ int __init gphonet_setup(struct usb_gadget *gadget)
 	SET_NETDEV_DEV(dev, &gadget->dev);
 
 	err = register_netdev(dev);
-	if (err)
+	if (err) {
 		free_netdev(dev);
-	return err;
+
+		return ERR_PTR(err);
+	}
+	return dev;
 }
 
-void gphonet_cleanup(void)
+void gphonet_cleanup(struct net_device *dev)
 {
 	unregister_netdev(dev);
 }
diff --git a/drivers/usb/gadget/nokia.c b/drivers/usb/gadget/nokia.c
index a69e8bf..5650ece 100644
--- a/drivers/usb/gadget/nokia.c
+++ b/drivers/usb/gadget/nokia.c
@@ -106,6 +106,8 @@ static struct usb_function *f_obex2_cfg1;
 static struct usb_function *f_obex1_cfg2;
 static struct usb_function *f_obex2_cfg2;
 static struct eth_dev *the_dev;
+static struct net_device *phonet_dev;
+
 
 static struct usb_configuration nokia_config_500ma_driver = {
 	.label		= "Bus Powered",
@@ -136,7 +138,7 @@ static int __init nokia_bind_config(struct usb_configuration *c)
 	int obex1_stat = 0;
 	int obex2_stat = 0;
 
-	status = phonet_bind_config(c);
+	status = phonet_bind_config(c, phonet_dev);
 	if (status)
 		pr_debug("could not bind phonet config\n");
 
@@ -211,9 +213,11 @@ static int __init nokia_bind(struct usb_composite_dev *cdev)
 	struct usb_gadget	*gadget = cdev->gadget;
 	int			status;
 
-	status = gphonet_setup(cdev->gadget);
-	if (status < 0)
+	phonet_dev = gphonet_setup(cdev->gadget);
+	if (IS_ERR(phonet_dev)) {
+		status = PTR_ERR(phonet_dev);
 		goto err_phonet;
+	}
 
 	the_dev = gether_setup(cdev->gadget, dev_addr, host_addr, host_mac,
 			       qmult);
@@ -278,7 +282,7 @@ err_obex2_inst:
 err_usb:
 	gether_cleanup(the_dev);
 err_ether:
-	gphonet_cleanup();
+	gphonet_cleanup(phonet_dev);
 err_phonet:
 	return status;
 }
@@ -300,7 +304,7 @@ static int __exit nokia_unbind(struct usb_composite_dev *cdev)
 	if (!IS_ERR(fi_obex2))
 		usb_put_function_instance(fi_obex2);
 	usb_put_function_instance(fi_acm);
-	gphonet_cleanup();
+	gphonet_cleanup(phonet_dev);
 
 	gether_cleanup(the_dev);
 
diff --git a/drivers/usb/gadget/u_phonet.h b/drivers/usb/gadget/u_phonet.h
index 09a7525..459ee32 100644
--- a/drivers/usb/gadget/u_phonet.h
+++ b/drivers/usb/gadget/u_phonet.h
@@ -14,8 +14,8 @@
 #include <linux/usb/composite.h>
 #include <linux/usb/cdc.h>
 
-int gphonet_setup(struct usb_gadget *gadget);
-int phonet_bind_config(struct usb_configuration *c);
-void gphonet_cleanup(void);
+struct net_device *gphonet_setup(struct usb_gadget *gadget);
+int phonet_bind_config(struct usb_configuration *c, struct net_device *dev);
+void gphonet_cleanup(struct net_device *dev);
 
 #endif /* __U_PHONET_H */
-- 
1.7.0.4

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