Subject: Re: Fwd: [RFC] IRQ type flags
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>,
       Linux Kernel List <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>
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Date: Mon, 07 Nov 2005 14:40:36 +1100
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> I was thinking that specifying neither would imply 'don't care' or
> 'system default'. That would mean existing drivers just worked and
> driver authors who didnt care need take no specific action.

Not only that, but as I wrote in my other mail, on some archs, the
system already got all the necessary triggers from the firmware and has
setup sane defaults, in which case it's more up to the driver to either
not care or adapt to what was set (some IRQ controllers don't support
all possible settings for example).

I would also expect PCI drivers to always pass default (rather than
explicitly level negative)

Ben.


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