linux-kernel - Re: [PATCH] irq: Add a new IRQF_ACK_BEFORE

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Message-ID: <20140313130905.GA23445@linutronix.de>
Date:	Thu, 13 Mar 2014 14:09:05 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Hans de Goede <hdegoede@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Carlo Caione <carlo.caione@...il.com>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH] irq: Add a new IRQF_ACK_BEFORE_UNMASK irq flag

* Thomas Gleixner | 2014-03-12 11:38:24 [+0100]:

>Untested patch below.
Tested-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

on DA850 / OMAP-L138. Without:
  59:        560   cp_intc  ohci_hcd:usb2
with the patch
  59:        280   cp_intc  ohci_hcd:usb2

that makes a difference of 280 interrupts. Prior the patch each
interrupt was handled twice and returned once with IRQ_HANDLED and the
second time with IRQ_NONE. With the proper EOI ack I don't see the
IRQ_NONE anymore.

Sebastian
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