From 5284acccc4a501f38dbeceabaa0340401c107654 Mon Sep 17 00:00:00 2001
From: Linyu Yuan <quic_linyyuan@quicinc.com>
Date: Thu, 18 Nov 2021 12:53:33 +0800
Subject: [PATCH] usb: gadget: configfs: use to_usb_function_instance() in cfg (un)link func
Git-commit: 5284acccc4a501f38dbeceabaa0340401c107654
Patch-mainline: v5.17-rc1
References: git-fixes

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

Reviewed-by: Jack Pham <quic_jackp@quicinc.com>
Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/1637211213-16400-5-git-send-email-quic_linyyuan@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/usb/gadget/configfs.c |   10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -416,9 +416,8 @@ static int config_usb_cfg_link(
 	struct usb_composite_dev *cdev = cfg->c.cdev;
 	struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
 
-	struct config_group *group = to_config_group(usb_func_ci);
-	struct usb_function_instance *fi = container_of(group,
-			struct usb_function_instance, group);
+	struct usb_function_instance *fi =
+			to_usb_function_instance(usb_func_ci);
 	struct usb_function_instance *a_fi;
 	struct usb_function *f;
 	int ret;
@@ -467,9 +466,8 @@ static void config_usb_cfg_unlink(
 	struct usb_composite_dev *cdev = cfg->c.cdev;
 	struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev);
 
-	struct config_group *group = to_config_group(usb_func_ci);
-	struct usb_function_instance *fi = container_of(group,
-			struct usb_function_instance, group);
+	struct usb_function_instance *fi =
+			to_usb_function_instance(usb_func_ci);
 	struct usb_function *f;
 
 	/*