Re: [PATCH] vt: avoid BUG_ON in con_shutdown when con_open returnswith error

[Alan Cox]

> I still wonder though if really the BUG_ON is ok, or I still didn't got
> that code right. Even if it returns -ERESTARTSYS we will hit that
> BUG_ON, if vc->port.tty != tty no? Or that is what the BUG_ON is trying
> to catch?

The code is trying to trap a locking error on hangup cases I think.
Although the console code currently handles this via its own different
locking so is a bit of a mess - it wants moving to the tty kref stuff
properly but thats not yet been done.

> While looking I noted a minor thing, in tty_open we don't need to check
> retval again in one place, as !retval is always true, because we return
> earlier (in retval = tty_add_file ...):

Agreed - that change

Acked-by: Alan Cox <alan@xxxxxxxxxxxxxxx>

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