linux-kernel - Re: [PATCH 0/4] mv643xx_eth: use mvmdio MDIO bus driver

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Date:	Fri, 15 Mar 2013 14:03:11 +0100
From:	Florian Fainelli <florian@...nwrt.org>
To:	David Miller <davem@...emloft.net>
CC:	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	rob@...dley.net, jason@...edaemon.net, andrew@...n.ch,
	linux@....linux.org.uk, benh@...nel.crashing.org, paulus@...ba.org,
	buytenh@...tstofly.org, thomas.petazzoni@...e-electrons.com,
	gregkh@...uxfoundation.org, devicetree-discuss@...ts.ozlabs.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org
Subject: Re: [PATCH 0/4] mv643xx_eth: use mvmdio MDIO bus driver

Le 03/15/13 14:05, David Miller a écrit :
> From: Florian Fainelli <florian@...nwrt.org>
> Date: Fri, 15 Mar 2013 13:53:10 +0100
>
>> Le 03/15/13 13:55, David Miller a écrit :
>>> From: David Miller <davem@...emloft.net>
>>> Date: Fri, 15 Mar 2013 08:53:21 -0400 (EDT)
>>>
>>>> From: Florian Fainelli <florian@...nwrt.org>
>>>> Date: Thu, 14 Mar 2013 19:08:31 +0100
>>>>
>>>>> This patch converts the mv643xx_eth driver to use the mvmdio MDIO bus
>>>>> driver
>>>>> instead of rolling its own implementation. As a result, all users of
>>>>> this
>>>>> mv643xx_eth driver are converted to register an "orion-mdio"
>>>>> platform_device.
>>>>> The mvmdio driver is also updated to support an interrupt line which
>>>>> reports
>>>>> SMI error/completion, and to allow traditionnal platform device
>>>>> registration
>>>>> instead of just device tree.
>>>>>
>>>>> David, I think it makes sense for you to merge all of this, since we
>>>>> do
>>>>> not want the architecture files to be desynchronized from the
>>>>> mv643xx_eth to
>>>>> avoid runtime breakage. The potential for merge conflicts should be
>>>>> very small.
>>>>
>>>> All applied to net-next, thanks.
>>>
>>> Actually, reverted.  Please send me code which actually compiles:
>>>
>>> drivers/net/ethernet/marvell/mvmdio.c: In function
>>> ‘orion_mdio_wait_ready’:
>>> drivers/net/ethernet/marvell/mvmdio.c:70:28: error: ‘NO_IRQ’
>>> undeclared (first use in this function)
>>> drivers/net/ethernet/marvell/mvmdio.c:70:28: note: each undeclared
>>> identifier is reported only once for each function it appears in
>>> drivers/net/ethernet/marvell/mvmdio.c: In function ‘orion_mdio_probe’:
>>> drivers/net/ethernet/marvell/mvmdio.c:242:24: error: ‘NO_IRQ’
>>> undeclared (first use in this function)
>>> make[4]: *** [drivers/net/ethernet/marvell/mvmdio.o] Error 1
>>>
>>> And don't use Kconfig dependencies to work around this, fix it
>>> properly.
>>
>> Is there any platform out there for which we do not have a NO_IRQ
>> definition by now? If so, what is it?
>
> Obviously if x86_64 doesn't even build your changes, that is one such
> platform.  Also, is grep not working on your computer?

I built tested on PowerPC and ARM which are the platforms actually 
*using* these drivers and forgot that you build for x86_64.

>
> Platforms are absolutely no required to have this define, zero is the
> only valid "no IRQ" which is portable in any way.
>
> This is an old and tired topic, portable code does not use NO_IRQ, and
> that's simply the end of it.

I changed not to rely on NO_IRQ anymore. Thanks!
--
Florian
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