usb-gadget/f_obex: use per-attribute show and store methods

To simplify the configfs interface and remove boilerplate code that also
causes binary bloat.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/usb/gadget/function/f_obex.c b/drivers/usb/gadget/function/f_obex.c
index 5460426057eb232d13e6a071a47f114fb8cd4e14..f6f1e6bd9186fb25181c59feb4486d9cae733309 100644 (file)
--- a/drivers/usb/gadget/function/f_obex.c
+++ b/drivers/usb/gadget/function/f_obex.c
@@ -395,22 +395,6 @@ static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
                            func_inst.group);
 }
 
-CONFIGFS_ATTR_STRUCT(f_serial_opts);
-static ssize_t f_obex_attr_show(struct config_item *item,
-                               struct configfs_attribute *attr,
-                               char *page)
-{
-       struct f_serial_opts *opts = to_f_serial_opts(item);
-       struct f_serial_opts_attribute *f_serial_opts_attr =
-               container_of(attr, struct f_serial_opts_attribute, attr);
-       ssize_t ret = 0;
-
-       if (f_serial_opts_attr->show)
-               ret = f_serial_opts_attr->show(opts, page);
-
-       return ret;
-}
-
 static void obex_attr_release(struct config_item *item)
 {
        struct f_serial_opts *opts = to_f_serial_opts(item);
@@ -420,19 +404,17 @@ static void obex_attr_release(struct config_item *item)
 
 static struct configfs_item_operations obex_item_ops = {
        .release        = obex_attr_release,
-       .show_attribute = f_obex_attr_show,
 };
 
-static ssize_t f_obex_port_num_show(struct f_serial_opts *opts, char *page)
+static ssize_t f_obex_port_num_show(struct config_item *item, char *page)
 {
-       return sprintf(page, "%u\n", opts->port_num);
+       return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num);
 }
 
-static struct f_serial_opts_attribute f_obex_port_num =
-       __CONFIGFS_ATTR_RO(port_num, f_obex_port_num_show);
+CONFIGFS_ATTR_RO(f_obex_, port_num);
 
 static struct configfs_attribute *acm_attrs[] = {
-       &f_obex_port_num.attr,
+       &f_obex_attr_port_num,
        NULL,
 };