linux-kernel - Re: [PATCH v1 06/23] media: ccs: Discard pm_runtime

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Message-ID: <aV6rNrdHDmnG9LwB@kekkonen.localdomain>
Date: Wed, 7 Jan 2026 20:51:34 +0200
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Brian Norris <briannorris@...omium.org>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org
Subject: Re: [PATCH v1 06/23] media: ccs: Discard pm_runtime_put() return
 value

Hi Rafael,

On Mon, Dec 22, 2025 at 09:03:25PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Passing the pm_runtime_put() return value to callers is not particularly
> useful.
> 
> Returning an error code from pm_runtime_put() merely means that it has
> not queued up a work item to check whether or not the device can be
> suspended and there are many perfectly valid situations in which that
> can happen, like after writing "on" to the devices' runtime PM "control"
> attribute in sysfs for one example.  It also happens when the kernel is
> configured with CONFIG_PM unset.
> 
> Accordingly, update ccs_post_streamoff() to simply discard the return
> value of pm_runtime_put() and always return success to the caller.
> 
> This will facilitate a planned change of the pm_runtime_put() return
> type to void in the future.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
> 
> This patch is part of a series, but it doesn't depend on anything else
> in that series.  The last patch in the series depends on it.
> 
> It can be applied by itself and if you decide to do so, please let me
> know.
> 
> Otherwise, an ACK or equivalent will be appreciated, but also the lack
> of specific criticism will be eventually regarded as consent.

Acked-by: Sakari Ailus <sakari.ailus@...ux.intel.com>

-- 
Sakari Ailus