usb: gadget: printer: add container_of helper for printer_dev

5 uses of container_of() in the same context justify wrapping it
in a static inline function.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/usb/gadget/legacy/printer.c b/drivers/usb/gadget/legacy/printer.c
index 806475c19934..955847fe8092 100644
--- a/drivers/usb/gadget/legacy/printer.c
+++ b/drivers/usb/gadget/legacy/printer.c
@@ -89,6 +89,11 @@ struct printer_dev {
         struct usb_function     function;
 };
 
+static inline struct printer_dev *func_to_printer(struct usb_function *f)
+{
+        return container_of(f, struct printer_dev, function);
+}
+
 static struct printer_dev usb_printer_gadget;
 
 /*-------------------------------------------------------------------------*/
@@ -973,7 +978,7 @@ static void printer_soft_reset(struct printer_dev *dev)
 static int printer_func_setup(struct usb_function *f,
                 const struct usb_ctrlrequest *ctrl)
 {
-        struct printer_dev *dev = container_of(f, struct printer_dev, function);
+        struct printer_dev *dev = func_to_printer(f);
         struct usb_composite_dev *cdev = f->config->cdev;
         struct usb_request      *req = cdev->req;
         int                     value = -EOPNOTSUPP;
@@ -1047,7 +1052,7 @@ static int __init printer_func_bind(struct usb_configuration *c,
                 struct usb_function *f)
 {
         struct usb_gadget *gadget = c->cdev->gadget;
-        struct printer_dev *dev = container_of(f, struct printer_dev, function);
+        struct printer_dev *dev = func_to_printer(f);
         struct device *pdev;
         struct usb_composite_dev *cdev = c->cdev;
         struct usb_ep *in_ep;
@@ -1159,7 +1164,7 @@ static void printer_func_unbind(struct usb_configuration *c,
         struct printer_dev      *dev;
         struct usb_request      *req;
 
-        dev = container_of(f, struct printer_dev, function);
+        dev = func_to_printer(f);
 
         device_destroy(usb_gadget_class, g_printer_devno);
 
@@ -1200,7 +1205,7 @@ static void printer_func_unbind(struct usb_configuration *c,
 static int printer_func_set_alt(struct usb_function *f,
                 unsigned intf, unsigned alt)
 {
-        struct printer_dev *dev = container_of(f, struct printer_dev, function);
+        struct printer_dev *dev = func_to_printer(f);
         int ret = -ENOTSUPP;
 
         if (!alt)
@@ -1211,7 +1216,7 @@ static int printer_func_set_alt(struct usb_function *f,
 
 static void printer_func_disable(struct usb_function *f)
 {
-        struct printer_dev *dev = container_of(f, struct printer_dev, function);
+        struct printer_dev *dev = func_to_printer(f);
         unsigned long           flags;
 
         DBG(dev, "%s\n", __func__);