usb: gadget: configfs: use to_config_usb_cfg() in os_desc_link()

replace open-coded container_of() with to_config_usb_cfg() helper.

Reviewed-by: Jack Pham <quic_jackp@quicinc.com>
Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/1637211213-16400-4-git-send-email-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index ae0890a..ff0fb33 100644 (file)
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -883,9 +883,7 @@ static int os_desc_link(struct config_item *os_desc_ci,
 {
        struct gadget_info *gi = os_desc_item_to_gadget_info(os_desc_ci);
        struct usb_composite_dev *cdev = &gi->cdev;
-       struct config_usb_cfg *c_target =
-               container_of(to_config_group(usb_cfg_ci),
-                            struct config_usb_cfg, group);
+       struct config_usb_cfg *c_target = to_config_usb_cfg(usb_cfg_ci);
        struct usb_configuration *c;
        int ret;