usb: gadget: hid: Convert to use list_count_nodes()

The list API provides the list_count_nodes() to help with counting
existing nodes in the list. Utilise it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221130134838.23805-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/legacy/hid.c b/drivers/usb/gadget/legacy/hid.c
index 1187ee4..133daf8 100644 (file)
--- a/drivers/usb/gadget/legacy/hid.c
+++ b/drivers/usb/gadget/legacy/hid.c
@@ -133,14 +133,11 @@ static struct usb_configuration config_driver = {
 static int hid_bind(struct usb_composite_dev *cdev)
 {
        struct usb_gadget *gadget = cdev->gadget;
-       struct list_head *tmp;
        struct hidg_func_node *n = NULL, *m, *iter_n;
        struct f_hid_opts *hid_opts;
-       int status, funcs = 0;
-
-       list_for_each(tmp, &hidg_func_list)
-               funcs++;
+       int status, funcs;
 
+       funcs = list_count_nodes(&hidg_func_list);
        if (!funcs)
                return -ENODEV;