linux-kernel - Re: [PATCH] powerpc/44x: Make AKEBONO depends on NET

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Message-ID: <87pnctuyq3.fsf@mpe.ellerman.id.au>
Date:   Tue, 31 Mar 2020 11:58:28 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     YueHaibing <yuehaibing@...wei.com>, mporter@...nel.crashing.org,
        benh@...nel.crashing.org, paulus@...ba.org
Cc:     alistair@...ple.id.au, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, YueHaibing <yuehaibing@...wei.com>
Subject: Re: [PATCH] powerpc/44x: Make AKEBONO depends on NET

YueHaibing <yuehaibing@...wei.com> writes:
> Fix Kconfig warnings:
>
> WARNING: unmet direct dependencies detected for NETDEVICES
>   Depends on [n]: NET [=n]
>   Selected by [y]:
>   - AKEBONO [=y] && PPC_47x [=y]
>
> WARNING: unmet direct dependencies detected for ETHERNET
>   Depends on [n]: NETDEVICES [=y] && NET [=n]
>   Selected by [y]:
>   - AKEBONO [=y] && PPC_47x [=y]
>
> AKEBONO select NETDEVICES and ETHERNET unconditionally,

It shouldn't do that, that's the job of a defconfig.

It might want to enable NET_VENDOR_IBM iff the config already has NET
and other dependencies enabled.

So the patch below might work?

cheers

diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 25ebe634a661..32aac4f40f1b 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -207,9 +207,7 @@ config AKEBONO
 	select PPC4xx_HSTA_MSI
 	select I2C
 	select I2C_IBM_IIC
-	select NETDEVICES
-	select ETHERNET
-	select NET_VENDOR_IBM
+	imply NET_VENDOR_IBM
 	select IBM_EMAC_EMAC4 if IBM_EMAC
 	select USB if USB_SUPPORT
 	select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD



> If NET is not set, build fails. Add this dependcy to fix this.
>
> Fixes: 2a2c74b2efcb ("IBM Akebono: Add the Akebono platform")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  arch/powerpc/platforms/44x/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
> index 25ebe634a661..394f662d7df2 100644
> --- a/arch/powerpc/platforms/44x/Kconfig
> +++ b/arch/powerpc/platforms/44x/Kconfig
> @@ -199,6 +199,7 @@ config FSP2
>  config AKEBONO
>  	bool "IBM Akebono (476gtr) Support"
>  	depends on PPC_47x
> +	depends on NET
>  	select SWIOTLB
>  	select 476FPE
>  	select PPC4xx_PCI_EXPRESS
> -- 
> 2.17.1