set the same channel in t.xfer.user_data as in t.done.
set the same channel in t.xfer.user_data as in t.done.

kylelemons/gousb,bernhardgoedel/gousb,kylelemons/gousb,kylelemons/gousb,bernhardgoedel/gousb,google/gousb,google/gousb,bernhardgoedel/gousb,google/gousb