[PATCH v3 5/6] usb: chipidea: let chipidea core device of_node equal's glue layer device of_node

Russell King - ARM Linux
2016-07-21T09:14:38Z

On Wed, Jul 20, 2016 at 05:40:28PM +0800, Peter Chen wrote:
> diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> index 69426e6..0d05812 100644
> --- a/drivers/usb/chipidea/core.c
> +++ b/drivers/usb/chipidea/core.c
> @@ -914,6 +914,16 @@ static int ci_hdrc_probe(struct platform_device *pdev)
> if (!ci)
> return -ENOMEM;
>
> + /*
> + * At device tree, we have no device node for chipidea core,
> + * the glue layer's node is the parent node for host and udc
> + * device. But in related driver, the parent device is chipidea
> + * core. So, in order to let the common driver get parent's node,
> + * we let the core's device node equals glue layer's node.
> + */
> + if (dev->parent && dev->parent->of_node)
> + dev->of_node = dev->parent->of_node;

This is a dangerous thing to do. You're changing the dev->of_node of
_this_ device, which means that _this_ driver will no longer match
the device if you remove and reinsert the driver module, or unbind
and try to re-bind the device to this driver.

--
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