linux-kernel - Re: [PATCH 3/4] iio: backend: make use of dev_errp

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Date: Thu, 4 Apr 2024 15:23:13 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Nuno Sa <nuno.sa@...log.com>
Cc: Petr Mladek <pmladek@...e.com>, Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Olivier Moysan <olivier.moysan@...s.st.com>,
	Jyoti Bhayana <jbhayana@...gle.com>,
	Chris Down <chris@...isdown.name>,
	John Ogness <john.ogness@...utronix.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: Re: [PATCH 3/4] iio: backend: make use of dev_errp_probe()

On Thu, Apr 04, 2024 at 01:06:25PM +0200, Nuno Sa wrote:
> Using dev_errp_probe() to simplify the code.

..

> +	if (IS_ERR(fwnode))
> +		return dev_errp_probe(dev, PTR_ERR(fwnode),
> +				      "Cannot get Firmware reference\n");

ERR_CAST() seems quite good candidate to have here.

		return dev_errp_probe(dev, fwnode, "Cannot get Firmware reference\n");

(Assuming dev_errp_probe() magically understands that, note you may have it as
 a macro and distinguish parameter type with _Generic() or so and behave
 differently: ERR_PTR() vs. ERR_CAST(), see acpi_dev_hid_uid_match()
 implementation, but also keep in mind that it doesn't distinguish NULL/0, there
 is a patch available in the mailing list to fix that, though.)

-- 
With Best Regards,
Andy Shevchenko