ACM_CTRL_RI        23 drivers/staging/gdm724x/gdm_tty.c #define ACM_CTRL_RI  0x08
ACM_CTRL_RI        45 drivers/usb/class/cdc-acm.h #define ACM_CTRL_RI		0x08
ACM_CTRL_RI        68 drivers/usb/gadget/function/f_acm.c #define ACM_CTRL_RI		(1 << 3)