linux-kernel - Re: [PATCH] Input: i8042 - signal wakeup from atkbd/psmouse

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Date:   Thu, 28 Mar 2019 11:26:02 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-input@...r.kernel.org,
        Ravi Chandra Sadineni <ravisadineni@...omium.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Shaunak Saha <shaunak.saha@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: i8042 - signal wakeup from atkbd/psmouse

On Wednesday, March 27, 2019 1:28:00 AM CET Dmitry Torokhov wrote:
> Instead of signalling wakeup directly from i8042, let psmouse and atkbd
> drivers execute basic protocol handling and only then signal wakeup
> condition. This solves the issue where we increment wakeup counter
> simply because we are getting responses from keyboard/mouse to the
> commands we ourselves send to them as part of suspend transition.
> 
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

LGTM:

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
>  drivers/input/keyboard/atkbd.c     | 2 ++
>  drivers/input/mouse/psmouse-base.c | 2 ++
>  drivers/input/serio/i8042.c        | 3 ---
>  3 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
> index 850bb259c20e..3ad93e3e2f4c 100644
> --- a/drivers/input/keyboard/atkbd.c
> +++ b/drivers/input/keyboard/atkbd.c
> @@ -401,6 +401,8 @@ static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
>  		if  (ps2_handle_response(&atkbd->ps2dev, data))
>  			goto out;
>  
> +	pm_wakeup_event(&serio->dev, 0);
> +
>  	if (!atkbd->enabled)
>  		goto out;
>  
> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
> index d3ff1fc09af7..94f7ca5ad077 100644
> --- a/drivers/input/mouse/psmouse-base.c
> +++ b/drivers/input/mouse/psmouse-base.c
> @@ -373,6 +373,8 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
>  		if  (ps2_handle_response(&psmouse->ps2dev, data))
>  			goto out;
>  
> +	pm_wakeup_event(&serio->dev, 0);
> +
>  	if (psmouse->state <= PSMOUSE_RESYNCING)
>  		goto out;
>  
> diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
> index 95a78ccbd847..6462f1798fbb 100644
> --- a/drivers/input/serio/i8042.c
> +++ b/drivers/input/serio/i8042.c
> @@ -573,9 +573,6 @@ static irqreturn_t i8042_interrupt(int irq, void *dev_id)
>  	port = &i8042_ports[port_no];
>  	serio = port->exists ? port->serio : NULL;
>  
> -	if (irq && serio)
> -		pm_wakeup_event(&serio->dev, 0);
> -
>  	filter_dbg(port->driver_bound, data, "<- i8042 (interrupt, %d, %d%s%s)\n",
>  		   port_no, irq,
>  		   dfl & SERIO_PARITY ? ", bad parity" : "",
>