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

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Date:   Thu, 23 Jun 2022 15:36:38 +0000
From:   Frank Li <frank.li@....com>
To:     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>
CC:     "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



> -----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
> 
> 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

>  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