linux-kernel - Re: [PATCH v1 09/43] clocksource: ep93xx: Add driver for Cirrus Logic EP93xx

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Date:   Wed, 21 Jun 2023 11:28:30 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Peters <mpeters@...eddedts.com>,
        Kris Bahnsen <kris@...eddedts.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 09/43] clocksource: ep93xx: Add driver for Cirrus Logic EP93xx

On Wed, Jun 21, 2023 at 11:22 AM Nikita Shubin
<nikita.shubin@...uefel.me> wrote:

...

> > > +       irq = irq_of_parse_and_map(np, 0);
> > > +       if (irq <= 0) {
> > > +               pr_err("ERROR: invalid interrupt number\n");
> > > +               ret = -EINVAL;
> >
> > Shadowed error in case of negative returned code. Why?
>
> Majority of clocksource drivers shadow it. Same like above.

It doesn't mean they are correct or using brand new APIs.

Can you use fwnode_irq_get() instead?
The shadowing is most likely due to nasty =0 comparison.

Also that ERROR is a bit weird, pr_err() is already on error level.

-- 
With Best Regards,
Andy Shevchenko