Re: [PATCH v2 for-4.9 04/32] MIPS: Lantiq: Fix cascaded IRQ setup

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Apr 05, 2017 at 04:01:56PM +0530, Amit Pundir wrote:
> From: Felix Fietkau <nbd@nbd.name>
> 
> With the IRQ stack changes integrated, the XRX200 devices started
> emitting a constant stream of kernel messages like this:
> 
> [  565.415310] Spurious IRQ: CAUSE=0x1100c300
> 
> This is caused by IP0 getting handled by plat_irq_dispatch() rather than
> its vectored interrupt handler, which is fixed by commit de856416e714
> ("MIPS: IRQ Stack: Fix erroneous jal to plat_irq_dispatch").
> 
> Fix plat_irq_dispatch() to handle non-vectored IPI interrupts correctly
> by setting up IP2-6 as proper chained IRQ handlers and calling do_IRQ
> for all MIPS CPU interrupts.
> 
> Signed-off-by: Felix Fietkau <nbd@nbd.name>
> Acked-by: John Crispin <john@phrozen.org>
> Cc: linux-mips@linux-mips.org
> Patchwork: https://patchwork.linux-mips.org/patch/15077/
> [james.hogan@imgtec.com: tweaked commit message]
> Signed-off-by: James Hogan <james.hogan@imgtec.com>
> 
> (cherry picked from commit 6c356eda225e3ee134ed4176b9ae3a76f793f4dd)
> Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
> ---
>  arch/mips/lantiq/irq.c | 38 +++++++++++++++++---------------------
>  1 file changed, 17 insertions(+), 21 deletions(-)

Also works for 4.4 and 4.10-stable...

greg k-h