* Grygorii Strashko <grygorii.stras...@ti.com> [150706 08:16]:
> The PSC IRQ is requested using request_irq() API and as result it can
> be forced to be threaded IRQ in RT-Kernel if PCS_QUIRK_HAS_SHARED_IRQ
> is enabled for pinctrl domain.
>
> As result, following 'possible irq lock inversion dependency' report
> can be seen:
...
> To fix it use IRQF_NO_THREAD to ensure that pcs irq will not be forced
> threaded.
>
> Cc: Tony Lindgren <t...@atomide.com>
> Cc: Sebastian Andrzej Siewior <bige...@linutronix.de>
> Signed-off-by: Grygorii Strashko <grygorii.stras...@ti.com>
> ---
> drivers/pinctrl/pinctrl-single.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/pinctrl-single.c
> b/drivers/pinctrl/pinctrl-single.c
> index b2de09d..0b8d480 100644
> --- a/drivers/pinctrl/pinctrl-single.c
> +++ b/drivers/pinctrl/pinctrl-single.c
> @@ -1760,7 +1760,8 @@ static int pcs_irq_init_chained_handler(struct
> pcs_device *pcs,
> int res;
>
> res = request_irq(pcs_soc->irq, pcs_irq_handler,
> - IRQF_SHARED | IRQF_NO_SUSPEND,
> + IRQF_SHARED | IRQF_NO_SUSPEND |
> + IRQF_NO_THREAD,
> name, pcs_soc);
> if (res) {
> pcs_soc->irq = -1;
Looks OK to me. The only case this would be a problem if a system has
a huge number of wake-up events as the list of status registers to
check could grow to the number of GPIO pins in theory. Anyways,
feel free to add:
Acked-by: Tony Lindgren <t...@atomide.com>
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