linux-kernel - Re: [RESEND PATCH] arm: assabet_defconfig: disable IDE subsystem

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Date:   Thu, 9 Mar 2017 14:51:47 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Sekhar Nori <nsekhar@...com>, Arnd Bergmann <arnd@...db.de>,
        Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
        Kevin Hilman <khilman@...libre.com>,
        linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
        Olof Johansson <olof@...om.net>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [RESEND PATCH] arm: assabet_defconfig: disable IDE subsystem

On Thu, Mar 09, 2017 at 03:42:49PM +0100, Bartlomiej Zolnierkiewicz wrote:
> 
> Hi,
> 
> On Thursday, March 09, 2017 01:57:15 PM Russell King - ARM Linux wrote:
> > On Thu, Mar 09, 2017 at 03:24:56PM +0300, Sergei Shtylyov wrote:
> > > On 03/09/2017 03:20 PM, Sekhar Nori wrote:
> > > 
> > > >[...]
> > > 
> > > >>>diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c
> > > >>>b/arch/arm/mach-davinci/board-dm644x-evm.c
> > > >>>index 023480b75244..60a1f23890cd 100644
> > > >>>--- a/arch/arm/mach-davinci/board-dm644x-evm.c
> > > >>>+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
> > > >>>@@ -744,7 +744,7 @@ static int davinci_phy_fixup(struct phy_device
> > > >>>*phydev)
> > > >>>     return 0;
> > > >>> }
> > > >>>
> > > >>>-#define HAS_ATA        IS_ENABLED(CONFIG_BLK_DEV_PALMCHIP_BK3710)
> > > >>>+#define HAS_ATA        IS_ENABLED(CONFIG_PATA_BK3710)
> > > >>
> > > >>   I think it would be more correct to check for both libata and IDE
> > > >>drivers here...
> > > >
> > > >As I understand, the plan is to remove the IDE driver soon.
> > > 
> > >    I'm not sure DaveM would support any removals in drivers/ide/. He has
> > > explicitly expressed his will to maintain the IDE driuver forever.
> > 
> > As I keep saying, there are ARM machines where the IDE driver works but
> > the PATA driver doesn't.  EBSA110's PCMCIA slots for instance.
> 
> Please be more specific, I'll be happy to help with migrating this
> machines to libata PATA.
> 
> BTW the example you're giving has never worked with the old IDE
> driver in the upstream kernel.

That's where you are wrong.  It worked for 10+ years with no
modifications in the upstream IDE driver or ide-cs driver - only the
patch I quoted was required.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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