linux-kernel - Re: [PATCH v1 2/3] pwm: dwc: simplify error handling

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Message-ID: <ZbZpMO9b7L-DNIcb@smile.fi.intel.com>
Date: Sun, 28 Jan 2024 16:48:16 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Raag Jadav <raag.jadav@...el.com>
Cc: u.kleine-koenig@...gutronix.de, jarkko.nikula@...ux.intel.com,
	mika.westerberg@...ux.intel.com, lakshmi.sowjanya.d@...el.com,
	linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/3] pwm: dwc: simplify error handling

On Mon, Jan 22, 2024 at 08:32:37AM +0530, Raag Jadav wrote:
> Simplify error handling in ->probe() function using dev_err_probe() helper.

..

>  	ret = pcim_iomap_regions(pci, BIT(0), pci_name(pci));
> -	if (ret) {
> -		dev_err(dev, "Failed to iomap PCI BAR (%pe)\n", ERR_PTR(ret));
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to iomap PCI BAR (%pe)\n", ERR_PTR(ret));
>  
>  	base = pcim_iomap_table(pci)[0];

> -	if (!base) {
> -		dev_err(dev, "Base address missing\n");
> -		return -ENOMEM;
> -	}
> +	if (!base)
> +		return dev_err_probe(dev, -ENOMEM, "Base address missing\n");

This check is bogus. Just remove it completely.

The pcim_iomap_table() fails IFF pcim_iomap_regions() fails.
You have checked the latter already.

-- 
With Best Regards,
Andy Shevchenko