--- zzzz-none-000/linux-3.10.107/drivers/usb/class/cdc-acm.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/usb/class/cdc-acm.h	2021-02-04 17:41:59.000000000 +0000
@@ -19,7 +19,7 @@
  */
 
 #define ACM_TTY_MAJOR		166
-#define ACM_TTY_MINORS		32
+#define ACM_TTY_MINORS		256
 
 /*
  * Requests.
@@ -105,6 +105,9 @@
 	struct work_struct work;			/* work queue entry for line discipline waking up */
 	unsigned int ctrlin;				/* input control lines (DCD, DSR, RI, break, overruns) */
 	unsigned int ctrlout;				/* output control lines (DTR, RTS) */
+	struct async_icount iocount;			/* counters for control line changes */
+	struct async_icount oldcount;			/* for comparison of counter */
+	wait_queue_head_t wioctl;			/* for ioctl */
 	unsigned int writesize;				/* max packet size for the output bulk endpoint */
 	unsigned int readsize,ctrlsize;			/* buffer sizes for freeing */
 	unsigned int minor;				/* acm minor number */
@@ -117,14 +120,17 @@
 	unsigned int throttle_req:1;			/* throttle requested */
 	u8 bInterval;
 	struct usb_anchor delayed;			/* writes queued for a device about to be woken */
+	unsigned long quirks;
 };
 
 #define CDC_DATA_INTERFACE_TYPE	0x0a
 
 /* constants describing various quirks and errors */
-#define NO_UNION_NORMAL			1
-#define SINGLE_RX_URB			2
-#define NO_CAP_LINE			4
-#define NOT_A_MODEM			8
-#define NO_DATA_INTERFACE		16
-#define IGNORE_DEVICE			32
+#define NO_UNION_NORMAL			BIT(0)
+#define SINGLE_RX_URB			BIT(1)
+#define NO_CAP_LINE			BIT(2)
+#define NO_DATA_INTERFACE		BIT(4)
+#define IGNORE_DEVICE			BIT(5)
+#define QUIRK_CONTROL_LINE_STATE	BIT(6)
+#define CLEAR_HALT_CONDITIONS		BIT(7)
+#define SEND_ZERO_PACKET		BIT(8)