On 2014年11月15日 13:41, Daniel Kurtz wrote:
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.
thanks, I will take your advice
Either way, this one is: Reviewed-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>of_node_put(ddc_node); } else { -- 1.9.1
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