Re: [PATCH] Kconfig cleanup (PARPORT_PC dependencies)

From: H. Peter Anvin
Date: Thu Sep 12 2013 - 16:56:27 EST


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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