FTDI_RS0_DSR     1058 drivers/usb/serial/ftdi_sio.c #define FTDI_STATUS_B0_MASK	(FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD)
FTDI_RS0_DSR     2504 drivers/usb/serial/ftdi_sio.c 		if (diff_status & FTDI_RS0_DSR)