linux-kernel - Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

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Date:   Wed, 13 Dec 2023 20:48:55 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     Nikita Shubin <nikita.shubin@...uefel.me>,
        Hartley Sweeten <hsweeten@...ionengravers.com>,
        Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Damien Le Moal <dlemoal@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-ide@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v6 36/40] ata: pata_ep93xx: remove legacy pinctrl use

On Wed, Dec 13, 2023 at 07:33:49PM +0100, Uwe Kleine-König wrote:
> On Wed, Dec 13, 2023 at 08:16:26PM +0200, Andy Shevchenko wrote:
> > On Tue, Dec 12, 2023 at 11:20:53AM +0300, Nikita Shubin wrote:
> > > Drop legacy acquire/release since we are using pinctrl for this now.

...

> > > -	if (IS_ERR(drv_data->dma_rx_channel)) {
> > > +	if (PTR_ERR_OR_ZERO(drv_data->dma_rx_channel)) {
> > 
> > This seems incorrect.
> > 
> > >  		ret = PTR_ERR(drv_data->dma_rx_channel);
> > >  		return dev_err_probe(dev, ret, "rx DMA setup failed");
> > 
> > 		return dev_err_probe(...);
> > 
> > >  	}
> > 
> > I think you wanted
> > 
> > 	ret = PTR_ERR_OR_ZERO(drv_data->dma_rx_channel);
> > 	if (ret)
> > 		return dev_err_probe(dev, ret, "rx DMA setup failed");
> 
> How is that different from
> 
> 	if (IS_ERR(drv_data->dma_rx_channel))
> 		return dev_err_probe(dev, PTR_ERR(drv_data->dma_rx_channel), "....");
> 
> (which seems to be more idiomatic to me)? While I was involved in
> creating PTR_ERR_OR_ZERO, I don't particularily like it (today).

Makes lines shorter, either works for me.

> Also note that you want a \n at the end of error messages.

Indeed.

-- 
With Best Regards,
Andy Shevchenko