On Fri, Nov 14, 2014 at 9:39 PM, Andy Yan <andy.yan@xxxxxxxxxxxxxx> wrote:
> drm driver may probe before the i2c bus, so the driver should
> defer probing until it is available
>
> Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
>
> ---
>
> Changes in v11: None
> Changes in v10: None
> Changes in v9: None
> Changes in v8: None
> Changes in v7: None
> Changes in v6: None
> Changes in v5: None
> Changes in v4:
> - defer probe ddc i2c adapter
>
> Changes in v3: None
> Changes in v2: None
>
> drivers/staging/imx-drm/imx-hdmi.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/imx-drm/imx-hdmi.c b/drivers/staging/imx-drm/imx-hdmi.c
> index 79daec4..c2b035a 100644
> --- a/drivers/staging/imx-drm/imx-hdmi.c
> +++ b/drivers/staging/imx-drm/imx-hdmi.c
> @@ -1611,8 +1611,11 @@ static int imx_hdmi_bind(struct device *dev, struct device *master, void *data)
> ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
> if (ddc_node) {
> hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
> - if (!hdmi->ddc)
> + if (!hdmi->ddc) {
> dev_dbg(hdmi->dev, "failed to read ddc node\n");
> + of_node_put(ddc_node);
> + return -EPROBE_DEFER;
> + }
Nit: You could move "of_node_put()" above "if (!hdmi->ddc)", and not
need it in two places.
Either way, this one is:
Reviewed-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
>
> of_node_put(ddc_node);
> } else {
> --
> 1.9.1
>
--
Daniel Kurtz | Software Engineer | djkurtz@xxxxxxxxxx | 650.204.0722
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