linux-kernel - Re: [PATCH] Kconfig cleanup (PARPORT

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Message-ID: <52322A4B.9050205@zytor.com>
Date:	Thu, 12 Sep 2013 13:55:39 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	Mark Salter <msalter@...hat.com>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org, rth@...ddle.net, vgupta@...opsys.com,
	linux@....linux.org.uk, tony.luck@...el.com, geert@...ux-m68k.org,
	monstr@...str.eu, ralf@...ux-mips.org, jejb@...isc-linux.org,
	benh@...nel.crashing.org, lethal@...ux-sh.org, davem@...emloft.net,
	cmetcalf@...era.com, gxt@...c.pku.edu.cn, tglx@...utronix.de,
	mingo@...hat.com
Subject: Re: [PATCH] Kconfig cleanup (PARPORT_PC dependencies)

On 09/12/2013 01:53 PM, Ingo Molnar wrote:
>>
>> I'm somewhat astonished that this driver is that problematic.  It is 
>> really just a very basic PIO interface, at least in the absence of 
>> EPP/ECP.
>>
>> It is, of course, also largely a dead interface at this point so it 
>> probably doesn't matter.
> 
> So, my collection of 'randconfig kernel crashers' has this exclusion and 
> comment:
> 
>  --- linux.orig/drivers/block/Kconfig
>  +++ linux/drivers/block/Kconfig
>  @@ -77,6 +77,11 @@ config GDROM
>   config PARIDE
>          tristate "Parallel port IDE device support"
>          depends on PARPORT_PC
>  +
>  +       # the probe can hang during bootup on non-PARIDE boxes
>  +       depends on BROKEN_BOOT_ALLOWED
>  +       select BROKEN_BOOT if PARIDE = y
>  +
> 
> So at least some uses of PARPORT_PC are unsafe. (might easily be a bug in 
> PARIDE)
> 

That I would believe.

	-hpa


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