linux-kernel - [patch 0/3] [patch 0/3] genirq: Suppress resend of level interrupts

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Date:	Sun, 12 Aug 2007 15:46:33 -0000
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Stable Team <stable@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jean-Baptiste Vignaud <vignaud@...dmail.fr>,
	"marcin.slusarz" <marcin.slusarz@...il.com>,
	Jarek Poplawski <jarkao2@...pl>
Subject: [patch 0/3] [patch 0/3] genirq: Suppress resend of level interrupts

The delayed irq disable functionality introduced a bug due to
retriggering level type interrupts in case of the delayed disable. The
resulting problem was discussed and debugged here:
http://marc.info/?l=linux-kernel&m=118202978609968&w=2

The resend of a level type interrupt is unnessecary and adds extra
noise to the system. Level type interrupts are resent by hardware when
they are still active at irq_enable(). The hard-/soft-ware resend is
only useful for edge type interrupts.

The following patch series addresses the problem and fixes an
unnoticed mismerge which affects the same area as well.

	tglx

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