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SubjectRe: serial core: crash / race condition on unbind
On 03/11/2014 06:58 AM, Geert Uytterhoeven wrote:
> Hi Peter,
>
> On Tue, Mar 11, 2014 at 4:14 AM, Peter Hurley <peter@hurleysoftware.com> wrote:
>>>
>>> [...]
>>>
>>> /*
>>> * Indicate that there isn't a port here anymore.
>>> */
>>> uport->type = PORT_UNKNOWN;
>>>
>>> state->uart_port = NULL;
>>
>> How did this ever work?
>>
>> Detaching the ll driver from the tty port in this manner is not ok;
>> as you already note, it blows up if consoles are still running.
>
> No one unbinds serial drivers using serial_core, as all these drivers are
> for fixed hardware?

Yep, never tested until now :)
Do you need this to work?

> Hot-pluggable usb-serial doesn't use serial_core.

I guess none of the 8250 PCI adapters are hot-pluggable...

Regards,
Peter Hurley





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