From: Greg Kroah-Hartman <greg@kroah.com>
Date: Sun, 31 Aug 2014 00:18:14 +0000 (-0700)
Subject: greybus: first framework for the es1 ap controller
X-Git-Tag: v4.9-rc1~119^2~378^2~21^2~2168
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f1eec30ac83cf95d0607a1c736cf42b44846bad8;p=karo-tx-linux.git

greybus: first framework for the es1 ap controller
---

diff --git a/drivers/staging/greybus/es1-ap-usb.c b/drivers/staging/greybus/es1-ap-usb.c
index 05c724881b07..991a53846e79 100644
--- a/drivers/staging/greybus/es1-ap-usb.c
+++ b/drivers/staging/greybus/es1-ap-usb.c
@@ -18,17 +18,40 @@ static const struct usb_device_id id_table[] = {
 };
 MODULE_DEVICE_TABLE(usb, id_table);
 
+/*
+ * Hack, we "know" we will only have one of these at any one time, so only
+ * create one static structure pointer.
+ */
+struct es1_ap_dev {
+	struct usb_interface *usb_intf;
+
+} *es1_ap_dev;
+
 
 static int ap_probe(struct usb_interface *interface,
 		    const struct usb_device_id *id)
 {
+	if (es1_ap_dev) {
+		dev_err(&interface->dev, "Already have a es1_ap_dev???\n");
+		return -ENODEV;
+	}
+	es1_ap_dev = kzalloc(sizeof(*es1_ap_dev), GFP_KERNEL);
+	if (!es1_ap_dev)
+		return -ENOMEM;
 
+	es1_ap_dev->usb_intf = interface;
+	usb_set_intfdata(interface, es1_ap_dev);
 	return 0;
 }
 
 static void ap_disconnect(struct usb_interface *interface)
 {
+	es1_ap_dev = usb_get_intfdata(interface);
+
+	/* Tear down everything! */
 
+	kfree(es1_ap_dev);
+	es1_ap_dev = NULL;
 
 }