From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: <linuxarm@huawei.com>, <mauro.chehab@huawei.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Hugues Fruchet <hugues.fruchet@st.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-media@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>
Subject: Re: [PATCH v4 73/79] media: stm32: use pm_runtime_resume_and_get()
Date: Fri, 30 Apr 2021 18:58:16 +0100 [thread overview]
Message-ID: <20210430185816.00000ef5@Huawei.com> (raw)
In-Reply-To: <cd918677e36e89196670cacd7027569e741f7d98.1619621413.git.mchehab+huawei@kernel.org>
On Wed, 28 Apr 2021 16:52:34 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> added pm_runtime_resume_and_get() in order to automatically handle
> dev->power.usage_count decrement on errors.
>
> Use the new API, in order to cleanup the error check logic.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
> drivers/media/platform/stm32/stm32-dcmi.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
> index bbcc2254fa2e..5f4e1db8cfcd 100644
> --- a/drivers/media/platform/stm32/stm32-dcmi.c
> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
> @@ -723,11 +723,11 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count)
> u32 val = 0;
> int ret;
>
> - ret = pm_runtime_get_sync(dcmi->dev);
> + ret = pm_runtime_resume_and_get(dcmi->dev);
> if (ret < 0) {
> dev_err(dcmi->dev, "%s: Failed to start streaming, cannot get sync (%d)\n",
> __func__, ret);
> - goto err_pm_put;
> + goto err_unlock;
maybe err_unlocked; to indicate the lock isn't held. This briefly confused me.
> }
>
> ret = media_pipeline_start(&dcmi->vdev->entity, &dcmi->pipeline);
> @@ -848,6 +848,7 @@ static int dcmi_start_streaming(struct vb2_queue *vq, unsigned int count)
>
> err_pm_put:
> pm_runtime_put(dcmi->dev);
> +err_unlock:
> spin_lock_irq(&dcmi->irqlock);
> /*
> * Return all buffers to vb2 in QUEUED state.
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next prev parent reply other threads:[~2021-04-30 18:01 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1619621413.git.mchehab+huawei@kernel.org>
2021-04-28 14:51 ` [PATCH v4 07/79] media: exynos-gsc: don't resume at remove time Mauro Carvalho Chehab
2021-04-28 15:25 ` Sylwester Nawrocki
2021-04-28 19:44 ` kernel test robot
2021-04-28 19:56 ` kernel test robot
2021-04-28 14:51 ` [PATCH v4 08/79] media: atmel: properly get pm_runtime Mauro Carvalho Chehab
2021-04-30 16:13 ` Jonathan Cameron
2021-04-28 14:51 ` [PATCH v4 10/79] media: mdk-mdp: fix pm_runtime_get_sync() usage count Mauro Carvalho Chehab
2021-04-30 16:30 ` Jonathan Cameron
2021-04-28 14:51 ` [PATCH v4 16/79] media: mtk-vcodec: " Mauro Carvalho Chehab
2021-04-30 16:44 ` Jonathan Cameron
2021-04-28 14:51 ` [PATCH v4 17/79] media: s5p-jpeg: " Mauro Carvalho Chehab
2021-04-28 14:51 ` [PATCH v4 19/79] media: sunxi: " Mauro Carvalho Chehab
2021-04-30 16:48 ` Jonathan Cameron
2021-04-28 14:51 ` [PATCH v4 22/79] staging: media: imx7-mipi-csis: use pm_runtime_resume_and_get() Mauro Carvalho Chehab
2021-04-28 14:51 ` [PATCH v4 24/79] staging: media: cedrus_video: " Mauro Carvalho Chehab
2021-04-30 17:05 ` Jonathan Cameron
2021-04-28 14:52 ` [PATCH v4 57/79] media: rockchip/rga: " Mauro Carvalho Chehab
2021-04-28 17:11 ` Ezequiel Garcia
2021-04-28 14:52 ` [PATCH v4 62/79] media: exynos4-is: " Mauro Carvalho Chehab
2021-04-30 17:49 ` Jonathan Cameron
2021-04-28 14:52 ` [PATCH v4 63/79] media: exynos-gsc: " Mauro Carvalho Chehab
2021-04-30 17:50 ` Jonathan Cameron
2021-04-28 14:52 ` [PATCH v4 64/79] media: mtk-jpeg: " Mauro Carvalho Chehab
2021-04-28 14:52 ` [PATCH v4 70/79] media: rkisp1: " Mauro Carvalho Chehab
2021-04-28 14:52 ` [PATCH v4 72/79] media: s5p-mfc: " Mauro Carvalho Chehab
2021-04-28 14:52 ` [PATCH v4 73/79] media: stm32: " Mauro Carvalho Chehab
2021-04-30 17:58 ` Jonathan Cameron [this message]
2021-04-28 14:52 ` [PATCH v4 74/79] media: sunxi: " Mauro Carvalho Chehab
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