From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: zhaoxiao <zhaoxiao@uniontech.com>,
thierry.reding@gmail.com, lee.jones@linaro.org
Cc: u.kleine-koenig@pengutronix.de,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-pwm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pwm: samsung: Simplify using devm_pwmchip_add()
Date: Wed, 1 Sep 2021 10:56:14 +0200 [thread overview]
Message-ID: <79e46f2f-c3ed-d187-2553-e64e0aac4c13@canonical.com> (raw)
In-Reply-To: <20210901054230.29678-1-zhaoxiao@uniontech.com>
On 01/09/2021 07:42, zhaoxiao wrote:
> With devm_pwmchip_add() we can drop pwmchip_remove() from the device
> remove callback. The latter can then go away, too and as this is the
> only user of platform_get_drvdata(), the respective call to
> platform_set_drvdata() can go, too.
>
> Signed-off-by: zhaoxiao <zhaoxiao@uniontech.com>
> ---
> drivers/pwm/pwm-samsung.c | 18 +-----------------
> 1 file changed, 1 insertion(+), 17 deletions(-)
>
> diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
> index f6c528f02d43..b860a7b8bbdf 100644
> --- a/drivers/pwm/pwm-samsung.c
> +++ b/drivers/pwm/pwm-samsung.c
> @@ -560,9 +560,7 @@ static int pwm_samsung_probe(struct platform_device *pdev)
> chip->tclk0 = devm_clk_get(&pdev->dev, "pwm-tclk0");
> chip->tclk1 = devm_clk_get(&pdev->dev, "pwm-tclk1");
>
> - platform_set_drvdata(pdev, chip);
The test looks untested because this should cause bug during resume.
> -
> - ret = pwmchip_add(&chip->chip);
> + ret = devm_pwmchip_add(&pdev->dev, &chip->chip);
> if (ret < 0) {
> dev_err(dev, "failed to register PWM chip\n");
> clk_disable_unprepare(chip->base_clk);
> @@ -577,19 +575,6 @@ static int pwm_samsung_probe(struct platform_device *pdev)
> return 0;
> }
>
> -static int pwm_samsung_remove(struct platform_device *pdev)
> -{
> - struct samsung_pwm_chip *chip = platform_get_drvdata(pdev);
> - int ret;
> -
> - ret = pwmchip_remove(&chip->chip);
> - if (ret < 0)
> - return ret;
> -
> - clk_disable_unprepare(chip->base_clk);
NAK, the patch looks bad. You cannot remove some code from remove()
callback just "because".
Best regards,
Krzysztof
next parent reply other threads:[~2021-09-01 8:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210901054230.29678-1-zhaoxiao@uniontech.com>
2021-09-01 8:56 ` Krzysztof Kozlowski [this message]
[not found] ` <612f43cc.1c69fb81.205fc.d94bSMTPIN_ADDED_BROKEN@mx.google.com>
2021-09-01 9:42 ` [PATCH] pwm: samsung: Simplify using devm_pwmchip_add() Krzysztof Kozlowski
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=79e46f2f-c3ed-d187-2553-e64e0aac4c13@canonical.com \
--to=krzysztof.kozlowski@canonical.com \
--cc=lee.jones@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pwm@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=thierry.reding@gmail.com \
--cc=u.kleine-koenig@pengutronix.de \
--cc=zhaoxiao@uniontech.com \
/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).