linux-kernel - RE: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret'

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Message-ID: <DM6PR11MB381919B83DB49F937E3EDEEA85D90@DM6PR11MB3819.namprd11.prod.outlook.com>
Date:   Fri, 17 Apr 2020 03:05:16 +0000
From:   "Wu, Hao" <hao.wu@...el.com>
To:     "Xu, Yilun" <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>
CC:     "mdf@...nel.org" <mdf@...nel.org>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhu@...hat.com" <bhu@...hat.com>
Subject: RE: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret'

> -----Original Message-----
> From: Xu, Yilun <yilun.xu@...el.com>
> Sent: Friday, April 17, 2020 9:56 AM
> To: Tom Rix <trix@...hat.com>
> Cc: Wu, Hao <hao.wu@...el.com>; mdf@...nel.org; linux-
> fpga@...r.kernel.org; linux-kernel@...r.kernel.org; bhu@...hat.com
> Subject: Re: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret'
> 
> Hi Rix:
> 
> This patch is based on linux-next. There is an preceding patch
> (3c2760b78f90 "fpga: dfl: pci: fix return value of cci_pci_sriov_configure",
> Also see Fixes:) in linux-next but not merged in 5.7-rc1 yet.
> This patch is to fix the lkp warning brought by the previous one.

Yilun

Is it possible that commit id may be different for master then? 

Thanks
Hao

> 
> Thanks.
> 
> On Thu, Apr 16, 2020 at 09:56:47AM -0700, Tom Rix wrote:
> > Please check the scope.
> >
> > On linus/master, the result of this change looks like
> >
> > static int cci_pci_sriov_configure(struct pci_dev *pcidev, int num_vfs)
> > {
> >     struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
> >     struct dfl_fpga_cdev *cdev = drvdata->cdev;
> >
> >     if (!num_vfs) {
> >         /*
> >          * disable SRIOV and then put released ports back to default
> >          * PF access mode.
> >          */
> >         pci_disable_sriov(pcidev);
> >
> >         dfl_fpga_cdev_config_ports_pf(cdev);
> >
> >     } else {
> >         int ret; <--- defined here
> >
> >         /*
> >          * before enable SRIOV, put released ports into VF access mode
> >          * first of all.
> >          */
> >         ret = dfl_fpga_cdev_config_ports_vf(cdev, num_vfs);
> >         if (ret)
> >             return ret;
> >
> >         ret = pci_enable_sriov(pcidev, num_vfs);
> >         if (ret)
> >             dfl_fpga_cdev_config_ports_pf(cdev);
> >     }
> >
> >     return ret;  <---- not in scope, not defined here
> > }
> >
> > Tom