Re: [PATCH v4] tty: serial: jsm: allocate queue buffer at probe time

[Jiri Slaby]

On 07. 07. 21, 14:52, Andy Shevchenko wrote:
> On Wed, Jul 7, 2021 at 10:50 AM Jiri Slaby <jirislaby@xxxxxxxxxx> wrote:
> > On 05. 07. 21, 14:53, Zheyu Ma wrote:
>
> > So how it comes an interrupt came before
> > neo_param() in jsm_tty_open was called?
>
> If IRQ is shared we have a special debug feature to test shared IRQs
> on freeing IRQ stage (*).
> But it doesn't matter, the IRQ handler must survive at any stage after
> the action has been listed.

Yes, but IRQ_NONE is returned from the ISR in that case.

The issue the patch is fixing is for a "malicious" device and I am not 
sure we want to fix this -- if I can put in a malicious device, I can 
use hammer to kill the box too…

thanks,
--
js