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SubjectRe: [PATCH 1/2] media: imx-mipi-csis: Fix clock handling in remove()
Hi Tomi,

Thank you for the patch.

On Wed, Nov 22, 2023 at 03:13:48PM +0200, Tomi Valkeinen wrote:
> The driver always calls mipi_csis_runtime_suspend() and
> mipi_csis_clk_disable() in remove(). This causes multiple WARNs from the
> kernel, as the clocks get disabled too many times.

Did you try to unload the driver ? What a weird idea :-)

> Fix the remove() to call mipi_csis_runtime_suspend() and
> mipi_csis_clk_disable() in a way that reverses what is done in probe().
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/media/platform/nxp/imx-mipi-csis.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/nxp/imx-mipi-csis.c b/drivers/media/platform/nxp/imx-mipi-csis.c
> index 6cb20b45e0a1..b39d7aeba750 100644
> --- a/drivers/media/platform/nxp/imx-mipi-csis.c
> +++ b/drivers/media/platform/nxp/imx-mipi-csis.c
> @@ -1502,8 +1502,10 @@ static void mipi_csis_remove(struct platform_device *pdev)
> v4l2_async_nf_cleanup(&csis->notifier);
> v4l2_async_unregister_subdev(&csis->sd);
>
> + if (!pm_runtime_enabled(&pdev->dev))
> + mipi_csis_runtime_suspend(&pdev->dev);
> +
> pm_runtime_disable(&pdev->dev);
> - mipi_csis_runtime_suspend(&pdev->dev);
> mipi_csis_clk_disable(csis);
> v4l2_subdev_cleanup(&csis->sd);
> media_entity_cleanup(&csis->sd.entity);
>

--
Regards,

Laurent Pinchart

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