linux-kernel - Re: [PATCH -next] NTB: EPF: Fix Kconfig dependency

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Message-ID: <20220623155524.GA1452766@bhelgaas>
Date:   Thu, 23 Jun 2022 10:55:24 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Frank Li <frank.li@....com>
Cc:     Ren Zhijie <renzhijie2@...wei.com>,
        "kishon@...com" <kishon@...com>,
        "lpieralisi@...nel.org" <lpieralisi@...nel.org>,
        "kw@...ux.com" <kw@...ux.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "jdmason@...zu.us" <jdmason@...zu.us>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] NTB: EPF: Fix Kconfig dependency

On Thu, Jun 23, 2022 at 03:36:38PM +0000, Frank Li wrote:
> > -----Original Message-----
> > From: Ren Zhijie <renzhijie2@...wei.com>
> > Sent: Thursday, June 23, 2022 3:46 AM
> > To: kishon@...com; lpieralisi@...nel.org; kw@...ux.com;
> > bhelgaas@...gle.com; jdmason@...zu.us; Frank Li <frank.li@....com>
> > Cc: linux-pci@...r.kernel.org; linux-kernel@...r.kernel.org; Ren Zhijie
> > <renzhijie2@...wei.com>
> > Subject: [PATCH -next] NTB: EPF: Fix Kconfig dependency

@Ren, please use a typical subject line for the file, e.g.,

  PCI: endpoint: ...

> > If CONFIG_NTB is not set and CONFIG_PCI_EPF_VNTB is y.
> > 
> > make ARCH=x86_64 CROSS_COMPILE=x86_64-linux-gnu-, will be failed, like
> > this:
> > 
> > drivers/pci/endpoint/functions/pci-epf-vntb.o: In function
> > `epf_ntb_cmd_handler':
> > pci-epf-vntb.c:(.text+0x95e): undefined reference to `ntb_db_event'
> > pci-epf-vntb.c:(.text+0xa1f): undefined reference to `ntb_link_event'
> > pci-epf-vntb.c:(.text+0xa42): undefined reference to `ntb_link_event'
> > drivers/pci/endpoint/functions/pci-epf-vntb.o: In function `pci_vntb_probe':
> > pci-epf-vntb.c:(.text+0x1250): undefined reference to `ntb_register_device'
> > 
> > The functions ntb_*() are defined in drivers/ntb/core.c, which need
> > CONFIG_NTB setting y to be build-in.
> > To fix this build error, add depends on NTB.
> > 
> > Reported-by: Hulk Robot <hulkci@...wei.com>
> > Fixes: ff32fac00d97("NTB: EPF: support NTB transfer between PCI RC and EP
> > connection")
> > Signed-off-by: Ren Zhijie <renzhijie2@...wei.com>
> > ---
> [Frank Li] Acked

@Frank: if you use the conventional style, e.g.,
"Acked-by: Frank Li <frank.li@....com>", tooling like b4 will
automatically pick it up.  Just saying "Acked" is likely to get missed
or ignored.
> 
> >  drivers/pci/endpoint/functions/Kconfig | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/pci/endpoint/functions/Kconfig
> > b/drivers/pci/endpoint/functions/Kconfig
> > index 362555b024e8..9beee4f0f4ee 100644
> > --- a/drivers/pci/endpoint/functions/Kconfig
> > +++ b/drivers/pci/endpoint/functions/Kconfig
> > @@ -29,6 +29,7 @@ config PCI_EPF_NTB
> >  config PCI_EPF_VNTB
> >          tristate "PCI Endpoint NTB driver"
> >          depends on PCI_ENDPOINT
> > +        depends on NTB
> >          select CONFIGFS_FS
> >          help
> >            Select this configuration option to enable the Non-Transparent
> > --
> > 2.17.1
>