Attachment 312322 Details for Bug 456218 – Upstream patch for this issue

[patch] Upstream patch for this issue

0001-Clear-spurious-irq-stat-information-when-adding-irq.patch (text/plain), 1.20 KB, created by Eugene Teo (Security Response) on 2008-07-22 09:55:50 UTC

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Creator: Eugene Teo (Security Response)

Created: 2008-07-22 09:55:50 UTC

Size: 1.20 KB

patch

obsolete

>From 8528b0f1de1101c6002036fd53638fb21111d0ea Mon Sep 17 00:00:00 2001
>From: Linus Torvalds <torvalds@woody.linux-foundation.org>
>Date: Tue, 23 Jan 2007 14:16:31 -0800
>Subject: [PATCH] Clear spurious irq stat information when adding irq handler
>
>Any newly added irq handler may obviously make any old spurious irq
>status invalid, since the new handler may well be the thing that is
>supposed to handle any interrupts that came in.
>
>So just clear the statistics when adding handlers.
>
>Pointed-out-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
>Acked-by: Thomas Gleixner <tglx@linutronix.de>
>Acked-by: Ingo Molnar <mingo@elte.hu>
>Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
>---
> kernel/irq/manage.c |    3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
>diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
>index b385878..8b961ad 100644
>--- a/kernel/irq/manage.c
>+++ b/kernel/irq/manage.c
>@@ -315,6 +315,9 @@ int setup_irq(unsigned int irq, struct irqaction *new)
> 			/* Undo nested disables: */
> 			desc->depth = 1;
> 	}
>+	/* Reset broken irq detection when installing new handler */
>+	desc->irq_count = 0;
>+	desc->irqs_unhandled = 0;
> 	spin_unlock_irqrestore(&desc->lock, flags);
> 
> 	new->irq = irq;
>-- 
>1.5.5.1
>

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