linux-kernel - Re: [Patch v6] i2c: pnx: Fix potential deadlock warning from del_timer

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Message-ID: <CAG+cZ06sqDuOer=fBcGhQkTUgWt9XqaLkAW0cmT8g=EJ+e8pWA@mail.gmail.com>
Date: Tue, 2 Jul 2024 11:13:06 +0200
From: Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>
To: Andi Shyti <andi.shyti@...nel.org>
Cc: Vladimir Zapolskiy <vz@...ia.com>, linux-arm-kernel@...ts.infradead.org, 
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch v6] i2c: pnx: Fix potential deadlock warning from
 del_timer_sync() call in isr

On Tue, Jul 2, 2024 at 1:01 AM Andi Shyti <andi.shyti@...nel.org> wrote:
> > @@ -653,7 +624,10 @@ static int i2c_pnx_probe(struct platform_device *pdev)
> >       alg_data->adapter.algo_data = alg_data;
> >       alg_data->adapter.nr = pdev->id;
> >
> > -     alg_data->timeout = I2C_PNX_TIMEOUT_DEFAULT;
> > +     alg_data->timeout = msecs_to_jiffies(I2C_PNX_TIMEOUT_DEFAULT);
> > +     if (alg_data->timeout <= 1)
> > +             alg_data->timeout = 2;
>
> I don't see the need for this check. The default timeout is
> defined as 10.
>
> Thanks,
> Andi

That's the timeout value which was in the previous timer in i2c_pnx_arm_timer(),
without this I had time out events.


-- 
Piotr Wojtaszczyk
Timesys