ACM_CTRL_DSR       22 drivers/staging/gdm724x/gdm_tty.c #define ACM_CTRL_DSR 0x02
ACM_CTRL_DSR       43 drivers/usb/class/cdc-acm.h #define ACM_CTRL_DSR		0x02
ACM_CTRL_DSR       70 drivers/usb/gadget/function/f_acm.c #define ACM_CTRL_DSR		(1 << 1)