linux-kernel - Re: [PATCH] PM / wakeup: Adjust messaging for wake events during suspend

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Date:	Mon, 24 Jun 2013 14:08:56 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Bernie Thompson <bhthompson@...omium.org>
Cc:	linux-pm@...r.kernel.org, Pavel Machek <pavel@....cz>,
	Len Brown <len.brown@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PM / wakeup: Adjust messaging for wake events during suspend

On Friday, May 31, 2013 05:47:43 PM Bernie Thompson wrote:
> This adds in a new message to the wakeup code which adds an indication to
> the log that suspend was cancelled due to a wake event occouring during
> the suspend sequence. It also adjusts the message printed in suspend.c to
> reflect the potential that a suspend was aborted, as opposed to a device
> failing to suspend.
> 
> Without these message adjustments one can end up with a kernel log that says
> that a device failed to suspend with no actual device suspend failures,
> which can be confusing to the log examiner.
> 
> Signed-off-by: Bernie Thompson <bhthompson@...omium.org>

Queued up for 3.11.

Thanks,
Rafael


> ---
>  drivers/base/power/wakeup.c | 4 +++-
>  kernel/power/suspend.c      | 2 +-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
> index 79715e7..407a2ef 100644
> --- a/drivers/base/power/wakeup.c
> +++ b/drivers/base/power/wakeup.c
> @@ -707,8 +707,10 @@ bool pm_wakeup_pending(void)
>  	}
>  	spin_unlock_irqrestore(&events_lock, flags);
>  
> -	if (ret)
> +	if (ret) {
> +		pr_info("PM: Wakeup pending, aborting suspend\n");
>  		print_active_wakeup_sources();
> +	}
>  
>  	return ret;
>  }
> diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
> index bef86d1..ece0422 100644
> --- a/kernel/power/suspend.c
> +++ b/kernel/power/suspend.c
> @@ -269,7 +269,7 @@ int suspend_devices_and_enter(suspend_state_t state)
>  	suspend_test_start();
>  	error = dpm_suspend_start(PMSG_SUSPEND);
>  	if (error) {
> -		printk(KERN_ERR "PM: Some devices failed to suspend\n");
> +		pr_err("PM: Some devices failed to suspend, or early wake event detected\n");
>  		goto Recover_platform;
>  	}
>  	suspend_test_finish("suspend devices");
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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