linux-kernel - Re: Ethernet driver on 2.6.22

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Message-Id: <20070924225517.f15d5a41.randy.dunlap@oracle.com>
Date:	Mon, 24 Sep 2007 22:55:17 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	hce <webmail.hce@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Ethernet driver on 2.6.22

On Tue, 25 Sep 2007 12:37:32 +1000 hce wrote:

> On 9/25/07, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> > On Tue, 25 Sep 2007 08:39:07 +1000 hce wrote:
> >
> > > On 9/24/07, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> > > > On Mon, 24 Sep 2007 12:40:07 +1000 hce wrote:
> > > >
> > > > > Thanks Randy.
> > > > >
> > > > > On 9/24/07, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> > > > > > On Mon, 24 Sep 2007 08:52:36 +1000 hce wrote:
> > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > I am upgrading from kernel 2.6.11 to 2.6.22 on ARM S3C2400A and found
> > > > > > > a following issue on 2.6.22.
> > > > > > >
> > > > > > > On 2.6.11, I selected CONFIG_ISA,  CONFIG_NET_PCI and CONFIG_CS89X0 to
> > > > > > > build  CS8900A Ethernet driver to kernel, it was running perfect.
> > > > > > >
> > > > > > > But on 2.6.22, I made the same configuration for CS8900A, the cs89x0.o
> > > > > > > could not be compiled in to the kernel (or as a module when I tried to
> > > > > > > CONFIG_CS89X0=m) unless I commented out depends statement in
> > > > > > > drivers/net/Kconfig. I double checked all three are CONFIG_ISA=y,
> > > > > > > CONFIG_NET_PCI=y and CONFIG_CS89X0=y. Any explanation please, was I
> > > > > > > missing something here?
> > > > > >
> > > > > > I didn't look in 2.6.11 Kconfig files, but in 2.6.22, this driver is
> > > > > > limited to 3 specific boards:
> > > > > >
> > > > > > config CS89x0
> > > > > >         tristate "CS89x0 support"
> > > > > >         depends on NET_PCI && (ISA || MACH_IXDP2351 || ARCH_IXDP2X01 || ARCH_PNX010X)
> > > > >
> > > > > The Kconfig for CS89x0 in 2.6.11 is exactly the same as 2.6.22.
> > > > >
> > > > > > Does ARM S3C2400A qualify as any of those?  (MACH_... or ARCH_...)
> > > > >
> > > > > I can run CS89x0 for ARM S3C2400 in 2.6.11, at least I can say yes,
> > > > > the ARM S3C2400A qualifies those in 2.6.11, I don't know the 2.6.22
> > > > > and I hope someone knows 2.6.22 well can answer it.
> > > > >
> > > > > > (latter: ARCH_PNX010X is not used anywhere else AFAICT)
> > > > >
> > > > > Yes, but you only need to enable ISA and NET_PCI to use CS89x0.
> > > >
> > > > Right.
> > > >
> > > > I don't have any problem building CS89x0 for X86_32:
> > > > make defconfig then enable ISA (what!?!?  why not in defconfig?)
> > > > and then enable CS89x0.
> > >
> > > I don't have my embedded system here, I'll try when I get there. But,
> > > let me clarify it, did you mean to type "make defconfig" on linux
> > > (kernel) directory, and enable ISA, NET_PCI and CS89x0 from the
> > > prompt?
> > >
> > > My procedure was to edit .config to enable ISA, NET_PCI and CS89x0
> > > from vim, then type "make menuconfig" and "make oldconfig" (The same
> > > procedure I did in 2.6.11 which works fine). Does that make things
> > > differently?
> >
> > You should do "make oldconfig" immediately after editing the .config
> > file (AFAIK).  Or the "make menuconfig" might run the oldconfig
> > changes for you.
> 
> Sorry, I was not clear. The procedure was actually I type "make
> ARCH=arm menuconfig" first, then I could not find the CONFIG_ISA,
> CONFIG_NET_SPI and CONFIG_CS89x0 on config screen, this is still
> puzzles me why could "make menuconfig" displays all possible
> configurations on 2.6.22? Could you please explain?

Probably not.

> Because I was not able to add CONFIG_ISA, CONFIG_NET_SPI and
                                                   NET_PCI
> CONFIG_CS89x0 from "make menuconfig", I used vim to manually added
> those and then "make oldconfig".
> 
> > Then I would just double-check the final .config file
> > to make sure that it contains what you expect it to contain.
> 
> Yes, I did double-check with the .config file, all three are =y.

After you ran "make oldconfig" ?


I don't know much about ARM configs.  You should probably be asking
about this on some linux-arm mailing list.

However, I did
  make ARCH=arm s3c2410_defconfig
and that particular board config enables ISA.  Then if I enabled
NET_PCI, I can also enable CS89x0.

The default ARM config (if there is one) doesn't seem to enable ISA.


---
~Randy
Phaedrus says that Quality is about caring.
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