Hi, in the documentation of the current kernel (2.6.x) you can find the following lines in Documentation/usb/gadget_serial.txt: ---8<--- Versions of the gadget serial driver are available for the 2.4 Linux kernels, but this document assumes you are using version 2.3 or later of the gadget serial driver in a 2.6 Linux kernel. ---8<--- Can anyone give me a hint where I can find the sources for drivers/usb/gadget/serial.c for the kernel 2.4? I mean the 'old-style' drivers/usb/gadget/serial.c which existed from kernel version 2.6.2 till 2.6.26.7 I cannot see a way to port this file back from 2.6.x to kernel version 2.4.x because of the massive changes in the tty layer. Thanks in advance TR -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ