From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
Pavel Machek <pavel@ucw.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Stephen Boyd <sboyd@kernel.org>, Taniya Das <tdas@codeaurora.org>,
Michael Turquette <mturquette@baylibre.com>,
Andy Gross <agross@kernel.org>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH v2 1/5] PM: runtime: add devm_pm_runtime_enable helper
Date: Wed, 28 Jul 2021 13:04:25 -0700 [thread overview]
Message-ID: <YQG4SVwUI21HugbG@ripper> (raw)
In-Reply-To: <20210728142445.774158-2-dmitry.baryshkov@linaro.org>
On Wed 28 Jul 07:24 PDT 2021, Dmitry Baryshkov wrote:
> Add helper function handling typical driver action: call
> pm_runtime_enable at the probe() time and disable it during remove().
>
This says what the patch does, but it doesn't say why we would like
these helpers - i.e. the fact that it's quite common across the kernel
to have error handlers and remove functions that simply has to do
pm_runtime_disable().
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
> drivers/base/power/runtime.c | 17 +++++++++++++++++
> include/linux/pm_runtime.h | 4 ++++
> 2 files changed, 21 insertions(+)
>
> diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
> index 8a66eaf731e4..ec94049442b9 100644
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -1447,6 +1447,23 @@ void pm_runtime_enable(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(pm_runtime_enable);
>
> +static void pm_runtime_disable_action(void *data)
> +{
> + pm_runtime_disable(data);
> +}
> +
> +/**
> + * devm_pm_runtime_enable - devres-enabled version of pm_runtime_enable.
() on the function name.
> + * @dev: Device to handle.
Returns: 0 on success, negative errno on failure
Regards,
Bjorn
> + */
> +int devm_pm_runtime_enable(struct device *dev)
> +{
> + pm_runtime_enable(dev);
> +
> + return devm_add_action_or_reset(dev, pm_runtime_disable_action, dev);
> +}
> +EXPORT_SYMBOL_GPL(devm_pm_runtime_enable);
> +
> /**
> * pm_runtime_forbid - Block runtime PM of a device.
> * @dev: Device to handle.
> diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
> index aab8b35e9f8a..222da43b7096 100644
> --- a/include/linux/pm_runtime.h
> +++ b/include/linux/pm_runtime.h
> @@ -59,6 +59,8 @@ extern void pm_runtime_put_suppliers(struct device *dev);
> extern void pm_runtime_new_link(struct device *dev);
> extern void pm_runtime_drop_link(struct device_link *link);
>
> +extern int devm_pm_runtime_enable(struct device *dev);
> +
> /**
> * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
> * @dev: Target device.
> @@ -253,6 +255,8 @@ static inline void __pm_runtime_disable(struct device *dev, bool c) {}
> static inline void pm_runtime_allow(struct device *dev) {}
> static inline void pm_runtime_forbid(struct device *dev) {}
>
> +static inline int devm_pm_runtime_enable(struct device *dev) { return 0; }
> +
> static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {}
> static inline void pm_runtime_get_noresume(struct device *dev) {}
> static inline void pm_runtime_put_noidle(struct device *dev) {}
> --
> 2.30.2
>
next prev parent reply other threads:[~2021-07-28 20:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 14:24 [PATCH v2 0/5] PM: add two devres helpers and use them in qcom cc Dmitry Baryshkov
2021-07-28 14:24 ` [PATCH v2 1/5] PM: runtime: add devm_pm_runtime_enable helper Dmitry Baryshkov
2021-07-28 20:04 ` Bjorn Andersson [this message]
2021-07-28 14:24 ` [PATCH v2 2/5] PM: clk: add devm_pm_clk_create helper Dmitry Baryshkov
2021-07-28 20:05 ` Bjorn Andersson
2021-07-28 14:24 ` [PATCH v2 3/5] clk: qcom: use devm_pm_runtime_enable and devm_pm_clk_create Dmitry Baryshkov
2021-07-28 15:00 ` Bjorn Andersson
2021-07-29 14:28 ` Dmitry Baryshkov
2021-07-28 14:24 ` [PATCH v2 4/5] clk: qcom: use common code for qcom_cc_probe_by_index Dmitry Baryshkov
2021-07-28 14:24 ` [PATCH v2 5/5] clk: qcom: move pm_clk functionality into common code Dmitry Baryshkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YQG4SVwUI21HugbG@ripper \
--to=bjorn.andersson@linaro.org \
--cc=agross@kernel.org \
--cc=dmitry.baryshkov@linaro.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mturquette@baylibre.com \
--cc=pavel@ucw.cz \
--cc=rjw@rjwysocki.net \
--cc=sboyd@kernel.org \
--cc=tdas@codeaurora.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).