linux-kernel - Re: Regression by 01f779f4862b ("irqchip/GIC: Don't deactivate interrupts forwarded to a guest")

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Date:	Thu, 17 Sep 2015 00:59:08 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	<jason@...edaemon.net>, <linux-arm-kernel@...ts.infradead.org>,
	<marc.zyngier@....com>, <linux-kernel@...r.kernel.org>
Subject: Re: Regression by 01f779f4862b ("irqchip/GIC: Don't deactivate
 interrupts forwarded to a guest")

On Wed, 16 Sep 2015 18:52:41 +0200
Thomas Gleixner <tglx@...utronix.de> wrote:

> On Thu, 17 Sep 2015, Jisheng Zhang wrote:
> 
> > Hi Marc,
> > 
> > Commit 01f779f4862b ("irqchip/GIC: Don't deactivate interrupts forwarded to a
> > guest") causes a regression on Marvell BG4CT SoC. In this SoC, there's only one
> > GIC, the secondary irq controller is Synopsys DW iCtl:
> > drivers/irqchip/irq-dw-apb-ictl.c
> > 
> > So cascading_gic_irq() should return true on Marvell BG4CT SoC, but it returns
> > false. The logic in cascading_gic_irq() doesn't take cascaded irq controller
> > which is provided by non-gic controllers.
> 
> I have a fix pending for this in
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.irq
> 
> 714665351cc7: irqchip/gic: Use IRQD_FORWARDED_TO_VCPU flag
> 
> Can you please give that a try?

Sure, Will try and get back to you

Thanks a lot

> 
> Thanks,
> 
> 	tglx

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