[PATCH kernel] powerpc/pci: Fix broken INTx configuration via OF

[Rob Herring]

On Wed, Feb 7, 2018 at 11:33 PM, Alexey Kardashevskiy <aik at ozlabs.ru> wrote:
> Commit 59f47eff03a0 ("powerpc/pci: Use of_irq_parse_and_map_pci() helper")
> correctly states that of_irq_parse_and_map_pci() does the same thing as
> of_irq_parse_pci() does as it simply calls
> of_irq_parse_pci() and irq_create_of_mapping().
>
> However of_irq_parse_and_map_pci() not only returns 0 for success and
> negative value for an error but also a positive virq value from
> irq_create_of_mapping() which the mentioned commit ignores and
> INTx config fails.
>
> This fixes the of_irq_parse_and_map_pci() return value handling.
>
> Fixes: 59f47eff03a0 "powerpc/pci: Use of_irq_parse_and_map_pci() helper"
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> ---
>
> Found it on POWER9 + powernv system - almost all devices suddenly lost
> INTx support.
> ---
>  arch/powerpc/kernel/pci-common.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Thanks.

Acked-by: Rob Herring <robh at kernel.org>