linux-kernel - Re: [PATCH] PM / sysfs: Expose suspend resume driver flags in sysfs

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Date:   Thu, 22 Oct 2020 07:31:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Chen Yu <yu.c.chen@...el.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <len.brown@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PM / sysfs: Expose suspend resume driver flags in sysfs

On Thu, Oct 22, 2020 at 11:23:24AM +0800, Chen Yu wrote:
> Currently there are 4 driver flags to control system suspend/resume
> behavior: DPM_FLAG_NO_DIRECT_COMPLETE, DPM_FLAG_SMART_PREPARE,
> DPM_FLAG_SMART_SUSPEND and DPM_FLAG_MAY_SKIP_RESUME. Make these flags
> visible in sysfs as read-only to get a brief understanding of the
> expected behavior of each device during suspend/resume, so as to
> facilitate suspend/resume debugging/tuning.
> 
> For example:
> /sys/devices/pci0000:00/0000:00:15.1/power/driver_flags:4
> (DPM_FLAG_SMART_SUSPEND)
> 
> /sys/devices/pci0000:00/0000:00:07.3/power/driver_flags:5
> (DPM_FLAG_NO_DIRECT_COMPLETE | DPM_FLAG_SMART_SUSPEND)
> 
> Acked-by: Len Brown <len.brown@...el.com>
> Signed-off-by: Chen Yu <yu.c.chen@...el.com>
> ---
>  drivers/base/power/sysfs.c | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)

There is no Documentataion/ABI/ entry for your new file, which makes
this patch impossible to properly review by anyone, and prevents it from
being able to be accepted.

Please fix.

thanks,

greg k-h