[PATCH] GPIO: mvebu-gpio: Don't initialize the mask_cache

[Andrew Lunn]

On Sat, Oct 27, 2012 at 06:53:05PM +0200, Thomas Petazzoni wrote:
> 
> On Sat, 27 Oct 2012 18:31:41 +0200, Linus Walleij wrote:
> > On Sat, Oct 27, 2012 at 3:28 PM, Andrew Lunn <andrew at lunn.ch> wrote:
> > 
> > > Due to the SMP nature of some of the chips, which have per CPU
> > > registers, the driver does not use the generic irq_gc_mask_set_bit() &
> > > irq_gc_mask_clr_bit() functions, which only support a single register.
> > > The driver has its own implementation of these functions, which can
> > > pick the correct register depending on the CPU being used. The
> > > functions do however use the gc->mask_cache value.
> > >
> > > The call to irq_setup_generic_chip() was passing
> > > IRQ_GC_INIT_MASK_CACHE, which caused the gc->mask_cache to be
> > > initialized to the contents of some random register. This resulted in
> > > unexpected interrupts been delivered from random GPIO lines.
> > >
> > > Signed-off-by: Andrew Lunn <andrew at lunn.ch>
> > 
> > Thanks, patch applied to fixes. Unless Thomas screams...
> 
> Acked-by-the-not-screaming: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> 
> Sounds good? :-)

https://lwn.net/Articles/503829

Its at least new...

	Andrew