Re: [PATCH] pinctrl: cherryview: Trigger hwirq0 for interrupt-lines without a mapping

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Tue, Jan 04, 2022 at 05:42:38PM +0100, Hans de Goede wrote:
> Commit bdfbef2d29dc ("pinctrl: cherryview: Don't use selection 0 to mark
> an interrupt line as unused") made the code properly differentiate
> between unset vs (hwirq) 0 entries in the GPIO-controller interrupt-line
> to GPIO pinnumber/hwirq mapping.
> 
> This is causing some boards to not boot. This commit restores the old
> behavior of triggering hwirq 0 when receiving an interrupt on an
> interrupt-line for which there is no mapping.

Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Linus, can you apply this directly for v5.16 release?

> Fixes: bdfbef2d29dc ("pinctrl: cherryview: Don't use selection 0 to mark an interrupt line as unused")
> Reported-and-tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
>  drivers/pinctrl/intel/pinctrl-cherryview.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c
> index 683b95e9639a..5d85ef5d5da8 100644
> --- a/drivers/pinctrl/intel/pinctrl-cherryview.c
> +++ b/drivers/pinctrl/intel/pinctrl-cherryview.c
> @@ -1471,8 +1471,9 @@ static void chv_gpio_irq_handler(struct irq_desc *desc)
>  
>  		offset = cctx->intr_lines[intr_line];
>  		if (offset == CHV_INVALID_HWIRQ) {
> -			dev_err(dev, "interrupt on unused interrupt line %u\n", intr_line);
> -			continue;
> +			dev_warn_once(dev, "interrupt on unmapped interrupt line %u\n", intr_line);
> +			/* Some boards expect hwirq 0 to trigger in this case */
> +			offset = 0;
>  		}
>  
>  		generic_handle_domain_irq(gc->irq.domain, offset);
> -- 
> 2.33.1
> 

-- 
With Best Regards,
Andy Shevchenko