#1826 Otg embedded host copy to device issue

[Anonymous]

embedded host libmtp not able to send zero length packet to device when connected with otg cable.
for a particular file size ( >4GB multiple of ep max size minus 12 bytes). for the file size above 4gb device f_mtp.c gadget relies on short packet for end of file. with windows operating system as host above mentioned file size zero length packet is sent. where as with embedded host otg transfer zero length packet is not issued. thats device indefinitely waits for the request even though complete data is copied. mtpdatapacket write function need to be modfied to intimate eof for device connected.

[Marcus Meissner]

is this a libmtp issue? or f_mtp gadget issue?