Re: [Qemu-devel] [PATCH] chardev: fix parallel device can't be reconnect.

[Paolo Bonzini]

On 10/07/2017 11:17, Marc-André Lureau wrote:
>     Parallel device don't register be->chr_can_read function, but remote
>     disconnect event is handled in chr_read.
>     So connected parallel device can not detect remote disconnect event.
> 
> What is it that you call a parallel device? you are modifying the socket
> code here. Could you describe a test setup? even better would be to
> write a test in test-char.c.

If I understand the patch correctly, the parallel device is the parallel
port emulation.

It's still not clear to me what scenario the patch is fixing, and the
patch is wrong anyway:

1) because the backend is not supposed to know the details of the
frontend that is connected to it;

2) because the character device's label is not a reliable indicator for
the frontend type (there is no such indicator, because of point 1).

Paolo