On Thu, 6 Aug 2015, Laszlo Papp wrote:

> > You should also add a printk statement to the disconnect callback so
> > that you can verify whether it really is getting called.
> 
> Thanks. Should that also be called if I just boot up the board with
> Linux on it while the cable is not attached.

No.  It gets called only at the time you unplug the cable.

> In other words, the
> problem that I am also experiencing is that it blocks even when no
> cable is attached to the board and there has been no cable ever
> attached for the last boot.

You didn't mention this before.

Alan Stern

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