linux-kernel - Re: [PATCH RESEND v5 11/18] PCI: dwc: Organize local variables usage

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Message-ID: <20220628233327.GA1879296@bhelgaas>
Date:   Tue, 28 Jun 2022 18:33:27 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Frank Li <Frank.Li@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND v5 11/18] PCI: dwc: Organize local variables usage

On Fri, Jun 24, 2022 at 05:34:21PM +0300, Serge Semin wrote:
> There are several places in the common DW PCIe code with incoherent local
> variables usage: a variable is defined and initialized with a structure
> field, but the structure pointer is de-referenced to access that field
> anyway; the local variable is defined and initialized but either used just
> once or not used afterwards in the main part of the subsequent method.
> It's mainly concerns the pcie_port.dev field. Let's fix that in the
> relevant places.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Rob Herring <robh@...nel.org>
> 
> ---
> 
> Changelog v4:
> - This is a new patch created on the v4 lap of the series.
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++------
>  drivers/pci/controller/dwc/pcie-designware.c      |  8 +++-----
>  2 files changed, 9 insertions(+), 11 deletions(-)

> @@ -633,7 +633,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
>  		}
>  
>  		if (pci->num_ob_windows <= atu_idx)
> -			dev_warn(pci->dev, "Resources exceed number of ATU entries (%d)\n",
> +			dev_warn(dev, "Resources exceed number of ATU entries (%d)\n",

I dropped this hunk because of this:

  drivers/pci/controller/dwc/pcie-designware-host.c:634:13: error: ‘dev’ undeclared (first use in this function); did you mean ‘cdev’?
    634 |    dev_warn(dev, "Resources exceed number of ATU entries (%d)\n",

>  				 pci->num_ob_windows);
>  	}
>