netdev - Re: [PATCH] net: dsa/slave: Fix compilation warnings

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Date:	Tue, 30 Oct 2012 10:00:20 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
CC:	Ben Hutchings <bhutchings@...arflare.com>, netdev@...r.kernel.org,
	linaro-dev@...ts.linaro.org, davem@...emloft.net,
	linux-kernel@...r.kernel.org, patches@...aro.org
Subject: Re: [PATCH] net: dsa/slave: Fix compilation warnings

On 10/30/2012 08:55 AM, Viresh Kumar wrote:
> On 30 October 2012 13:23, Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>>> From: Viresh Kumar <viresh.kumar@...aro.org>
> 
>>>  config NET_DSA_TAG_DSA
>>> -     bool
>>> +     bool "Original DSA packet tagging format"
>>> +     select NET_DSt
>>
>> typo NET_DSA
> 
> Unbelievable mistake :(
> 
> Will fix it after some reviews now :)

Yeah, has to be ! ;)

It is very curious if we disable all the configs option, a slave
creation raise a BUG (cf. dsa_slave_create). IIUC, booting with NET_DSA
enabled and none of the NET_DSA_TAG* enabled will raise a BUG in the
probe function, right ?

Maybe we should force at least one config when none are set ?

diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 274791c..86326e3 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -1,8 +1,9 @@
-config NET_DSA
+menuconfig NET_DSA
        tristate "Distributed Switch Architecture support"
        default n
        depends on EXPERIMENTAL && NETDEVICES && !S390
        select PHYLIB
+       select NET_DSA_TAG_DSA if (!NET_DSA_TAG_EDSA &&
!NET_DSA_TAG_TRAILER)
        ---help---
          This allows you to use hardware switch chips that use
          the Distributed Switch Architecture.
@@ -12,15 +13,15 @@ if NET_DSA

 # tagging formats
 config NET_DSA_TAG_DSA
-       bool
+       bool "tag dsa"
        default n

 config NET_DSA_TAG_EDSA
-       bool
+       bool "tag edsa"
        default n

 config NET_DSA_TAG_TRAILER
-       bool
+       bool "tag trailer"
        default n

 endif


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