linux-kernel - Re: [PATCH v1 2/3] thermal/debugfs: Pass cooling device state to thermal_debug_cdev

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Message-ID: <e9be06af-48bf-45ec-8d6d-6147d20b6780@arm.com>
Date: Thu, 25 Apr 2024 11:02:44 +0100
From: Lukasz Luba <lukasz.luba@....com>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: LKML <linux-kernel@...r.kernel.org>, Linux PM <linux-pm@...r.kernel.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: Re: [PATCH v1 2/3] thermal/debugfs: Pass cooling device state to
 thermal_debug_cdev_add()

Hi Rafael,

On 4/23/24 19:00, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> If cdev_dt_seq_show() runs before the first state transition of a cooling
> device, it will not print any state residency information for it, even
> though it might be reasonably expected to print residency information for
> the initial state of the cooling device.
> 
> For this reason, rearrange the code to get the initial state of a cooling
> device at the registration time and pass it to thermal_debug_cdev_add(),
> so that the latter can create a duration record for that state which will
> allow cdev_dt_seq_show() to print its residency information.
> 
> Fixes: 755113d76786 ("thermal/debugfs: Add thermal cooling device debugfs information")
> Reported-by: Lukasz Luba <lukasz.luba@....com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>   drivers/thermal/thermal_core.c    |    9 +++++++--
>   drivers/thermal/thermal_debugfs.c |   12 ++++++++++--
>   drivers/thermal/thermal_debugfs.h |    4 ++--
>   3 files changed, 19 insertions(+), 6 deletions(-)
> 

I'm trying to test it on my board and do the review, but faced issue.
For some reason I couldn't apply that patch on the latest bleeding-edge
branch.
Could you help me in this please? Is there something missing in the
patch set (like one more fist patch)?

Regards,
Lukasz