@@ -1076,7 +1076,6 @@ static void usb_deregister_bus (struct usb_bus *bus)
static int register_root_hub(struct usb_hcd *hcd)
{
struct device *parent_dev = hcd->self.controller;
- struct device *sysdev = hcd->self.sysdev;
struct usb_device *usb_dev = hcd->self.root_hub;
const int devnum = 1;
int retval;
@@ -1123,7 +1122,6 @@ static int register_root_hub(struct usb_hcd *hcd)
/* Did the HC die before the root hub was registered? */
if (HCD_DEAD(hcd))
usb_hc_died (hcd); /* This time clean up */
- usb_dev->dev.of_node = sysdev->of_node;
}
mutex_unlock(&usb_bus_idr_lock);
@@ -416,8 +416,7 @@ static void usb_release_dev(struct device *dev)
usb_destroy_configuration(udev);
usb_release_bos_descriptor(udev);
- if (udev->parent)
- of_node_put(dev->of_node);
+ of_node_put(dev->of_node);
usb_put_hcd(hcd);
kfree(udev->product);
kfree(udev->manufacturer);
@@ -616,6 +615,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
dev->route = 0;
dev->dev.parent = bus->controller;
+ device_set_of_node_from_dev(&dev->dev, bus->sysdev);
dev_set_name(&dev->dev, "usb%d", bus->busnum);
root_hub = 1;
} else {
In an attempt to work around a pinmux over-allocation issue in driver core, commit dc5878abf49c ("usb: core: move root hub's device node assignment after it is added to bus") moved the device-tree node assignment until after the root hub had been registered. This not only makes the device-tree node unavailable to the usb driver during probe, but also prevents the of_node from being linked to in sysfs and causes a race with user-space for the (recently added) devspec attribute. Use the new device_set_of_node_from_dev() helper to reuse the node of the sysdev device, something which now prevents driver core from trying to reclaim any pinctrl pins during probe. Fixes: dc5878abf49c ("usb: core: move root hub's device node assignment after it is added to bus") Fixes: 51fa91475e43 ("usb/core: Added devspec sysfs entry for devices behind the usb hub") Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/usb/core/hcd.c | 2 -- drivers/usb/core/usb.c | 4 ++-- 2 files changed, 2 insertions(+), 4 deletions(-)