linux-kernel - Re: [PATCH v5 2/6] pinctrl: qcom: Use return value from irq_set

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Date:   Mon, 31 Aug 2020 18:19:18 +0000
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Maulik Shah <mkshah@...eaurora.org>
Cc:     maz@...nel.org, linus.walleij@...aro.org, swboyd@...omium.org,
        evgreen@...omium.org, mka@...omium.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-gpio@...r.kernel.org, agross@...nel.org, tglx@...utronix.de,
        jason@...edaemon.net, dianders@...omium.org, rnayak@...eaurora.org,
        ilina@...eaurora.org, lsrao@...eaurora.org
Subject: Re: [PATCH v5 2/6] pinctrl: qcom: Use return value from
 irq_set_wake() call

On Sat 22 Aug 16:16 UTC 2020, Maulik Shah wrote:

> msmgpio irqchip was not using return value of irq_set_irq_wake() callback
> since previously GIC-v3 irqchip neither had IRQCHIP_SKIP_SET_WAKE flag nor
> it implemented .irq_set_wake callback. This lead to irq_set_irq_wake()
> return error -ENXIO.
> 
> However from 'commit 4110b5cbb014 ("irqchip/gic-v3: Allow interrupt to be
> configured as wake-up sources")' GIC irqchip has IRQCHIP_SKIP_SET_WAKE
> flag.
> 
> Use return value from irq_set_irq_wake() and irq_chip_set_wake_parent()
> instead of always returning success.
> 
> Fixes: e35a6ae0eb3a ("pinctrl/msm: Setup GPIO chip in hierarchy")
> Signed-off-by: Maulik Shah <mkshah@...eaurora.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Stephen Boyd <swboyd@...omium.org>

Acked-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  drivers/pinctrl/qcom/pinctrl-msm.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
> index 1c23f5c..1df2322 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c
> @@ -1077,12 +1077,10 @@ static int msm_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
>  	 * when TLMM is powered on. To allow that, enable the GPIO
>  	 * summary line to be wakeup capable at GIC.
>  	 */
> -	if (d->parent_data)
> -		irq_chip_set_wake_parent(d, on);
> -
> -	irq_set_irq_wake(pctrl->irq, on);
> +	if (d->parent_data && test_bit(d->hwirq, pctrl->skip_wake_irqs))
> +		return irq_chip_set_wake_parent(d, on);
>  
> -	return 0;
> +	return irq_set_irq_wake(pctrl->irq, on);
>  }
>  
>  static int msm_gpio_irq_reqres(struct irq_data *d)
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>