linux-kernel - Re: [PATCH v2 4/5] mei: gsc: add runtime pm handlers

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Message-ID: <YfGNsSuRGAxYLfCG@kroah.com>
Date:   Wed, 26 Jan 2022 19:06:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Alexander Usyskin <alexander.usyskin@...el.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Vitaly Lubart <vitaly.lubart@...el.com>,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/5] mei: gsc: add runtime pm handlers

On Wed, Jan 19, 2022 at 05:58:06PM +0200, Alexander Usyskin wrote:
> From: Tomas Winkler <tomas.winkler@...el.com>
> 
> Implement runtime handlers for mei-gsc, to track
> idle state of the device properly.
> 
> CC: Rodrigo Vivi <rodrigo.vivi@...el.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
> ---
>  drivers/misc/mei/gsc-me.c | 80 ++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 79 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
> index f58e54d2c1fc..fddae8009b62 100644
> --- a/drivers/misc/mei/gsc-me.c
> +++ b/drivers/misc/mei/gsc-me.c
> @@ -158,7 +158,85 @@ static int __maybe_unused mei_gsc_pm_resume(struct device *device)
>  	return 0;
>  }
>  
> -static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
> +static int __maybe_unused mei_gsc_pm_runtime_idle(struct device *device)
> +{
> +	struct mei_device *dev;
> +
> +	dev_dbg(device, "rpm: me: runtime_idle\n");
> +
> +	dev = dev_get_drvdata(device);
> +	if (!dev)
> +		return -ENODEV;
> +	if (mei_write_is_idle(dev))
> +		pm_runtime_autosuspend(device);
> +
> +	return -EBUSY;
> +}
> +
> +static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
> +{
> +	struct mei_device *dev;
> +	struct mei_me_hw *hw;
> +	int ret;
> +
> +	dev_dbg(device, "rpm: me: runtime suspend\n");

No need for debugging code to remain, use ftrace if you really need it.

Same for other dev_dbg() calls in this patch, they can all be removed.

thanks,

greg k-h