linux-kernel - Re: [PATCH] PCI: tegra: Fix reporting GPIO error value

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Date:   Tue, 14 Apr 2020 13:31:04 +0200
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Pali Rohár <pali@...nel.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Andrew Murray <amurray@...goodpenguin.co.uk>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        linux-tegra@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: tegra: Fix reporting GPIO error value

On Tue, Apr 14, 2020 at 12:25:12PM +0200, Pali Rohár wrote:
> Error code is stored in rp->reset_gpio and not in err variable.
> 
> Signed-off-by: Pali Rohár <pali@...nel.org>
> ---
>  drivers/pci/controller/pci-tegra.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
> index 0e03cef72840..378d5a8773c7 100644
> --- a/drivers/pci/controller/pci-tegra.c
> +++ b/drivers/pci/controller/pci-tegra.c
> @@ -2314,8 +2314,8 @@ static int tegra_pcie_parse_dt(struct tegra_pcie *pcie)
>  			if (PTR_ERR(rp->reset_gpio) == -ENOENT) {
>  				rp->reset_gpio = NULL;
>  			} else {
> -				dev_err(dev, "failed to get reset GPIO: %d\n",
> -					err);
> +				dev_err(dev, "failed to get reset GPIO: %ld\n",
> +					PTR_ERR(rp->reset_gpio));
>  				return PTR_ERR(rp->reset_gpio);
>  			}
>  		}

You can use %pe directly on the pointer for added benefit of translation
of the error to a name.

Best Regards,
Michał Mirosław