ACK_HDR_LEN        20 drivers/media/usb/dvb-usb-v2/af9015.c #define ACK_HDR_LEN 2 /* rece header size */
ACK_HDR_LEN        35 drivers/media/usb/dvb-usb-v2/af9035.c #define ACK_HDR_LEN 3 /* rece header size */