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

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Date:   Wed, 29 Jun 2022 05:03:05 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        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>,
        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 Tue, Jun 28, 2022 at 06:33:27PM -0500, Bjorn Helgaas wrote:
> 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",
> 

Right. It must have been fixed by the auto-merging procedure of my
local working git-dir. Thanks.

-Sergey

> >  				 pci->num_ob_windows);
> >  	}
> >