linux-kernel - Re: [PATCH 6/8] PCI: aardvark: Add support for issuing PERST via GPIO

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Date:   Sun, 19 Apr 2020 05:23:40 +0200
From:   Marek Behun <marek.behun@....cz>
To:     Pali Rohár <pali@...nel.org>
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Remi Pommarel <repk@...plefau.lt>,
        Tomasz Maciej Nowak <tmn505@...il.com>,
        Xogium <contact@...ium.me>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 6/8] PCI: aardvark: Add support for issuing PERST via
 GPIO

On Wed, 15 Apr 2020 18:03:46 +0200
Pali Rohár <pali@...nel.org> wrote:

> +	if (IS_ERR(pcie->reset_gpio)) {
> +		if (PTR_ERR(pcie->reset_gpio) == -ENOENT) {
> +			pcie->reset_gpio = NULL;

this assignment is redundant, the variable is already NULL, such
structures are zeroed after allocation

> +		} else {
> +			if (PTR_ERR(pcie->reset_gpio) != -EPROBE_DEFER)
> +				dev_err(dev, "Failed to retrieve reset GPIO (%ld)\n",
> +					PTR_ERR(pcie->reset_gpio));
> +			return PTR_ERR(pcie->reset_gpio);
> +		}
> +	}