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drm/tegra: Use i2c_put_adapter() instead of put_device()

Message ID 20200408180244.3079849-1-thierry.reding@gmail.com
State New
Headers show
Series drm/tegra: Use i2c_put_adapter() instead of put_device() | expand

Commit Message

Thierry Reding April 8, 2020, 6:02 p.m. UTC
From: Thierry Reding <treding@nvidia.com>

In order to properly release the I2C adapter used for DDC/CI, use the
i2c_put_adapter() function provided by the I2C subsystem rather than the
put_device() function which doesn't include code to drop a reference to
the adapter's owner module.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/tegra/output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Sam Ravnborg April 8, 2020, 6:31 p.m. UTC | #1
Hi Thierry

On Wed, Apr 08, 2020 at 08:02:44PM +0200, Thierry Reding wrote:
> From: Thierry Reding <treding@nvidia.com>
> 
> In order to properly release the I2C adapter used for DDC/CI, use the
> i2c_put_adapter() function provided by the I2C subsystem rather than the
> put_device() function which doesn't include code to drop a reference to
> the adapter's owner module.

Is this a problem for the other users too?

$ cd drivers/gpu/drm; git grep put_device | grep ddc

exynos/exynos_hdmi.c:	put_device(&hdata->ddc_adpt->dev);
exynos/exynos_hdmi.c:	put_device(&hdata->ddc_adpt->dev);
panel/panel-simple.c:		put_device(&panel->ddc->dev);
panel/panel-simple.c:		put_device(&panel->ddc->dev);
tegra/output.c:		put_device(&output->ddc->dev);
vc4/vc4_hdmi.c:	put_device(&hdmi->ddc->dev);
vc4/vc4_hdmi.c:	put_device(&hdmi->ddc->dev);

??

	Sam

> 
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
>  drivers/gpu/drm/tegra/output.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
> index a264259b97a2..136fd2f56af0 100644
> --- a/drivers/gpu/drm/tegra/output.c
> +++ b/drivers/gpu/drm/tegra/output.c
> @@ -177,7 +177,7 @@ void tegra_output_remove(struct tegra_output *output)
>  		free_irq(output->hpd_irq, output);
>  
>  	if (output->ddc)
> -		put_device(&output->ddc->dev);
> +		i2c_put_adapter(output->ddc);
>  }
>  
>  int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
> -- 
> 2.24.1
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff mbox series

Patch

diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index a264259b97a2..136fd2f56af0 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -177,7 +177,7 @@  void tegra_output_remove(struct tegra_output *output)
 		free_irq(output->hpd_irq, output);
 
 	if (output->ddc)
-		put_device(&output->ddc->dev);
+		i2c_put_adapter(output->ddc);
 }
 
 int tegra_output_init(struct drm_device *drm, struct tegra_output *output)