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SubjectRe: [RFC PATCH v4 3/8] drm/rockchip: dw-mipi-dsi: Fix error handling path
On Tue, Oct 17, 2017 at 06:16:19PM +0800, Jeffy Chen wrote:
> Add missing pm_runtime_disable() in bind()'s error handling path.
>
> Also cleanup encoder & connector in unbind().
>
> Fixes: 80a9a059d4e4 ("drm/rockchip/dsi: add dw-mipi power domain support")
> Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
> ---
>
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
>
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 17 +++++++++++------
> 1 file changed, 11 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index b15755b6129c..a17ff0f6f489 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -1282,7 +1282,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> ret = dw_mipi_dsi_register(drm, dsi);
> if (ret) {
> DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
> - goto err_pllref;
> + goto err_disable_pllref;
> }
>
> pm_runtime_enable(dev);
> @@ -1292,23 +1292,24 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
> ret = mipi_dsi_host_register(&dsi->dsi_host);
> if (ret) {
> DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
> - goto err_cleanup;
> + goto err_disable_pm_runtime;
> }
>
> if (!dsi->panel) {
> ret = -EPROBE_DEFER;
> - goto err_mipi_dsi_host;
> + goto err_unreg_mipi_dsi_host;
> }
>
> dev_set_drvdata(dev, dsi);
> return 0;
>
> -err_mipi_dsi_host:
> +err_unreg_mipi_dsi_host:
> mipi_dsi_host_unregister(&dsi->dsi_host);
> -err_cleanup:
> +err_disable_pm_runtime:
> + pm_runtime_disable(dev);
> drm_encoder_cleanup(&dsi->encoder);
> drm_connector_cleanup(&dsi->connector);

Should you update these to call the destroy hook like in unbind()?

Sean

> -err_pllref:
> +err_disable_pllref:
> clk_disable_unprepare(dsi->pllref_clk);
> return ret;
> }
> @@ -1320,6 +1321,10 @@ static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
>
> mipi_dsi_host_unregister(&dsi->dsi_host);
> pm_runtime_disable(dev);
> +
> + dsi->connector.funcs->destroy(&dsi->connector);
> + dsi->encoder.funcs->destroy(&dsi->encoder);
> +
> clk_disable_unprepare(dsi->pllref_clk);
> }
>
> --
> 2.11.0
>
>

--
Sean Paul, Software Engineer, Google / Chromium OS

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