1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/gadget/g_zero.h b/drivers/usb/gadget/g_zero.h
index a1c1a978b5e..19ec50a42a7 100644
--- a/drivers/usb/gadget/g_zero.h
+++ b/drivers/usb/gadget/g_zero.h
@@ -6,6 +6,9 @@
 #ifndef __G_ZERO_H
 #define __G_ZERO_H
 
+#define GZERO_BULK_BUFLEN	4096
+#define GZERO_QLEN		32
+
 struct usb_zero_options {
 	unsigned pattern;
 	unsigned isoc_interval;
@@ -30,6 +33,15 @@ struct f_lb_opts {
 	struct usb_function_instance func_inst;
 	unsigned bulk_buflen;
 	unsigned qlen;
+
+	/*
+	 * Read/write access to configfs attributes is handled by configfs.
+	 *
+	 * This is to protect the data from concurrent access by read/write
+	 * and create symlink/remove symlink.
+	 */
+	struct mutex			lock;
+	int				refcnt;
 };
 
 void lb_modexit(void);