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Message-ID: <20231109192639.77yjq7o2bioyvf5j@pengutronix.de>
Date: Thu, 9 Nov 2023 20:26:39 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, linux-pwm@...r.kernel.org,
linux-kernel@...r.kernel.org,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Alim Akhtar <alim.akhtar@...sung.com>,
Thierry Reding <thierry.reding@...il.com>,
Sam Protsenko <semen.protsenko@...aro.org>,
Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [PATCH 1/2] pwm: samsung: Fix broken resume after putting
per-channel data into driver data
Hello,
On Thu, Nov 09, 2023 at 11:47:47AM +0100, Marek Szyprowski wrote:
> PWMF_EXPORTED is misleadingly used as a bit numer in the pwm->flags, not
> as a flag value, so the proper test for it must use test_bit() helper.
> This fixes broken resume after putting per-channel data into driver data.
>
> Fixes: e3fe982b2e4e ("pwm: samsung: Put per-channel data into driver data")
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
> drivers/pwm/pwm-samsung.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pwm/pwm-samsung.c b/drivers/pwm/pwm-samsung.c
> index 568491ed6829..69d9f4577b34 100644
> --- a/drivers/pwm/pwm-samsung.c
> +++ b/drivers/pwm/pwm-samsung.c
> @@ -631,7 +631,7 @@ static int pwm_samsung_resume(struct device *dev)
> struct pwm_device *pwm = &chip->pwms[i];
> struct samsung_pwm_channel *chan = &our_chip->channel[i];
>
> - if (!(pwm->flags & PWMF_REQUESTED))
> + if (!test_bit(PWMF_REQUESTED, &pwm->flags))
> continue;
This is prior art:
https://lore.kernel.org/linux-pwm/e031db45-add0-4da7-97fa-dee95ee936ad@moroto.mountain/
unfortunately this was missed to be included in Thierry's PR for
v6.7-rc1 :-\
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
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