linux-kernel - Re: [PATCH v2 2/2] iio: dac: adi-axi-dac: use unique bus free check

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Message-ID: <CAHp75VfpgqNnLOn4n+Tf03mmLFMj36SsV7j06TvhEhyqmmGgVw@mail.gmail.com>
Date: Wed, 30 Apr 2025 01:05:17 +0300
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Angelo Dureghello <adureghello@...libre.com>
Cc: Andy Shevchenko <andy@...nel.org>, Nuno Sa <nuno.sa@...log.com>, 
	Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich <Michael.Hennerich@...log.com>, 
	Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>, linux-iio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v2 2/2] iio: dac: adi-axi-dac: use unique bus free check

On Tue, Apr 29, 2025 at 5:34 PM Angelo Dureghello
<adureghello@...libre.com> wrote:
> On 09.04.2025 19:51, Andy Shevchenko wrote:
> > On Wed, Apr 09, 2025 at 11:16:55AM +0200, Angelo Dureghello wrote:

...

> > > +   if (ret == -ETIMEDOUT)
> > > +           dev_err(st->dev, "AXI bus timeout\n");
> >
> > Why do you need this? The error code will go to the user space at the end? If
> > yes, it will be enough to have it printed there, no?
> >
>
> This warning means something very bad happen at AXI level. I never seen
> this warning issued, but it may help to debug AXI/HDL issues, would not
> remove it.

But wouldn't user space get the error code and translate to a message if needed?

> > > +   return ret;

-- 
With Best Regards,
Andy Shevchenko