linux-kernel - Re: [PATCH 0/3] irqchip: orion: bridge irq fixes for v3.14-rc1

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Date:	Thu, 6 Feb 2014 14:10:40 -0300
From:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
To:	Jason Cooper <jason@...edaemon.net>
Cc:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>, linux-kernel@...r.kernel.org,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/3] irqchip: orion: bridge irq fixes for v3.14-rc1

On Tue, Feb 04, 2014 at 11:54:15PM -0500, Jason Cooper wrote:
> On Thu, Jan 23, 2014 at 11:38:03PM +0100, Sebastian Hesselbarth wrote:
> > This is a small patch set to fix some shortcomings how Orion bridge
> > irqs are handled. The patches are based on v3.13-rc8 and should go
> > into v3.14. They can possibly also marked for -stable down to v3.10.
> > 
> > This patches are the result of a discussion about a stale watchdog irq,
> > that can accidentially trigger the watchdog's irq handler and cause a
> > reset [1].
> > 
> > The first patch will add a write to clear already pending interrupts
> > on init. The second patch replaces handle_level_irq with handle_edge_irq
> > which is more appropriate for bridge irqs which are edge-triggered.
> > The last patch finally, fixes stale interrupts by installing an
> > .irq_enable callback, that will clear a possible pending interrupt
> > before unmasking it.
> > 
> > [1] http://www.spinics.net/lists/arm-kernel/msg302106.html
> > 
> > Sebastian Hesselbarth (3):
> >   irqchip: orion: clear bridge cause register on init
> >   irqchip: orion: use handle_edge_irq on bridge irqs
> >   irqchip: orion: clear stale interrupts in irq_enable
> > 
> >  drivers/irqchip/irq-orion.c | 18 ++++++++++++++++--
> >  1 file changed, 16 insertions(+), 2 deletions(-)
> 
> Whole series applied to mvebu-next/irqchip-fixes (v2 for 3/3).  Once I
> see that the outstanding pull requests for mvebu/irqchip have been
> merged into mainline, I'll be changing the name of this branch to
> mvebu/irqchip-fixes.  I just don't want to upset the applecart atm.
> 
> Oh yeah, Cc'd for stable back to v3.10.
> 

If you want to pick this:

Tested-by: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>

Tested Kirkwood Topkick and Dove Cubox. Quite frankly, I haven't checked
this series prevents an "errant watchdog", but just pursued a boot test.

-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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