linux-kernel - Re: [PATCH] HID: intel-ish-hid: ipc: only enable IRQ wakeup when requested

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Date:   Wed, 01 Dec 2021 05:34:56 -0800
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Thomas Weißschuh <linux@...ssschuh.net>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Mark Pearson <markpearson@...ovo.com>,
        Daniel Drubin <daniel.drubin@...el.com>
Subject: Re: [PATCH] HID: intel-ish-hid: ipc: only enable IRQ wakeup when
 requested

On Tue, 2021-11-30 at 07:01 +0100, Thomas Weißschuh wrote:
> Fixes spurious wakeups from s0ix on Lenovo ThinkPad X1 Cargon Gen 9
> on
> lid close.
> 
> These wakeups are generated by interrupts from the ISH on changes to
> the
> lid status.
> 
> By disabling the wake IRQ from the ISH we inhibit these spurious
> wakeups while keeping the resume from LID open through the ACPI
> interrupt.
> 
> Reports on the Lenovo forums indicate that Lenovo ThinkPad X1 Yoga
> Gen6
> is also affected.
> 
> Fixes: ae02e5d40d5f ("HID: intel-ish-hid: ipc layer")
> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214855
> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>

> ---
>  drivers/hid/intel-ish-hid/ipc/pci-ish.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hid/intel-ish-hid/ipc/pci-ish.c
> b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
> index 1c5039081db2..8e9d9450cb83 100644
> --- a/drivers/hid/intel-ish-hid/ipc/pci-ish.c
> +++ b/drivers/hid/intel-ish-hid/ipc/pci-ish.c
> @@ -266,7 +266,8 @@ static void __maybe_unused
> ish_resume_handler(struct work_struct *work)
>  
>         if (ish_should_leave_d0i3(pdev) && !dev->suspend_flag
>                         && IPC_IS_ISH_ILUP(fwsts)) {
> -               disable_irq_wake(pdev->irq);
> +               if (device_may_wakeup(&pdev->dev))
> +                       disable_irq_wake(pdev->irq);
>  
>                 ish_set_host_ready(dev);
>  
> @@ -337,7 +338,8 @@ static int __maybe_unused ish_suspend(struct device
> *device)
>                          */
>                         pci_save_state(pdev);
>  
> -                       enable_irq_wake(pdev->irq);
> +                       if (device_may_wakeup(&pdev->dev))
> +                               enable_irq_wake(pdev->irq);
>                 }
>         } else {
>                 /*
> 
> base-commit: d58071a8a76d779eedab38033ae4c821c30295a5