linux-kernel - Re: [PATCH 04/10] MIPS: disable CONFIG_IDE in sb1250_swarm

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Date:   Fri, 19 Mar 2021 01:12:38 +0100 (CET)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     Christoph Hellwig <hch@....de>
cc:     "David S. Miller" <davem@...emloft.net>,
        Jens Axboe <axboe@...nel.dk>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-ide@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-alpha@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 04/10] MIPS: disable CONFIG_IDE in
 sb1250_swarm_defconfig

On Thu, 18 Mar 2021, Christoph Hellwig wrote:

> sb1250_swarm_defconfig enables CONFIG_IDE but no actual host controller
> driver, so just drop CONFIG_IDE, CONFIG_BLK_DEV_IDECD and
> CONFIG_BLK_DEV_IDETAPE as they are useless.

 Actually BLK_DEV_PLATFORM would handle the SWARM's platform driver as an 
IDE device, however the driver has supported libata ever since commit 
2fef357cf391 ("IDE: Fix platform device registration in Swarm IDE driver 
(v2)") back in 2008, so this is good to go.  We should probably enable 
PATA_PLATFORM in the defconfig instead.

 The printed name of the driver could be improved I suppose though:

scsi host0: pata_platform
ata1: PATA max PIO0 mmio cmd 0x100b3e00 ctl 0x100b7ec0 irq 36

(PIO3 is actually hardwired; it's an odd interface and people reported 
issues with it, but I have never had any myself be it with IDE or libata).

Acked-by: Maciej W. Rozycki <macro@...am.me.uk>

  Maciej