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. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
