| Message ID | 1587006712-22696-2-git-send-email-yilun.xu@intel.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
| Series | Bug fixes for FPGA DFL | expand |
> -----Original Message----- > From: linux-fpga-owner@vger.kernel.org <linux-fpga-owner@vger.kernel.org> > On Behalf Of Xu Yilun > Sent: Thursday, April 16, 2020 11:12 AM > To: mdf@kernel.org; linux-fpga@vger.kernel.org; linux- > kernel@vger.kernel.org > Cc: trix@redhat.com; bhu@redhat.com; Xu, Yilun <yilun.xu@intel.com> > Subject: [PATCH 1/2] fpga: dfl: pci: reduce the scope of variable 'ret' > > This is to fix lkp cppcheck warnings: > > drivers/fpga/dfl-pci.c:230:6: warning: The scope of the variable 'ret' can be > reduced. [variableScope] > int ret = 0; > ^ > > drivers/fpga/dfl-pci.c:230:10: warning: Variable 'ret' is assigned a value that > is never used. [unreadVariable] > int ret = 0; > ^ > > Fixes: 3c2760b78f90 ("fpga: dfl: pci: fix return value of > cci_pci_sriov_configure") > Reported-by: kbuild test robot <lkp@intel.com> > Signed-off-by: Xu Yilun <yilun.xu@intel.com> Looks good to me. Acked-by: Wu Hao <hao.wu@intel.com> > --- > drivers/fpga/dfl-pci.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c > index 5387550..a78c409 100644 > --- a/drivers/fpga/dfl-pci.c > +++ b/drivers/fpga/dfl-pci.c > @@ -227,7 +227,6 @@ 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; > - int ret = 0; > > if (!num_vfs) { > /* > @@ -239,6 +238,8 @@ static int cci_pci_sriov_configure(struct pci_dev > *pcidev, int num_vfs) > dfl_fpga_cdev_config_ports_pf(cdev); > > } else { > + int ret; > + > /* > * before enable SRIOV, put released ports into VF access > mode > * first of all. > -- > 2.7.4
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
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. 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
> -----Original Message----- > From: Xu, Yilun <yilun.xu@intel.com> > Sent: Friday, April 17, 2020 9:56 AM > To: Tom Rix <trix@redhat.com> > Cc: Wu, Hao <hao.wu@intel.com>; mdf@kernel.org; linux- > fpga@vger.kernel.org; linux-kernel@vger.kernel.org; bhu@redhat.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
On Fri, Apr 17, 2020 at 11:05:16AM +0800, Wu, Hao wrote: > > -----Original Message----- > > From: Xu, Yilun <yilun.xu@intel.com> > > Sent: Friday, April 17, 2020 9:56 AM > > To: Tom Rix <trix@redhat.com> > > Cc: Wu, Hao <hao.wu@intel.com>; mdf@kernel.org; linux- > > fpga@vger.kernel.org; linux-kernel@vger.kernel.org; bhu@redhat.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? It is possible if the previous patch need a little change when merging to master. I'm not sure how to handle this then. But the previous patch is simple and is unlikely to change. > > 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
> > > 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? > > It is possible if the previous patch need a little change when merging > to master. > > I'm not sure how to handle this then. But the previous patch is simple > and is unlikely to change. Maybe you can resend it once previous patch gets merged. Hao
diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c index 5387550..a78c409 100644 --- a/drivers/fpga/dfl-pci.c +++ b/drivers/fpga/dfl-pci.c @@ -227,7 +227,6 @@ 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; - int ret = 0; if (!num_vfs) { /* @@ -239,6 +238,8 @@ static int cci_pci_sriov_configure(struct pci_dev *pcidev, int num_vfs) dfl_fpga_cdev_config_ports_pf(cdev); } else { + int ret; + /* * before enable SRIOV, put released ports into VF access mode * first of all.
This is to fix lkp cppcheck warnings: drivers/fpga/dfl-pci.c:230:6: warning: The scope of the variable 'ret' can be reduced. [variableScope] int ret = 0; ^ drivers/fpga/dfl-pci.c:230:10: warning: Variable 'ret' is assigned a value that is never used. [unreadVariable] int ret = 0; ^ Fixes: 3c2760b78f90 ("fpga: dfl: pci: fix return value of cci_pci_sriov_configure") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Xu Yilun <yilun.xu@intel.com> --- drivers/fpga/dfl-pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)