From dc5878abf49c06b9c1d3d161760957a98ab970bf Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Mon, 25 Apr 2016 09:57:18 +0800 Subject: [PATCH] usb: core: move root hub's device node assignment after it is added to bus When the root hub device is added to the bus, it tries to get pins information from pinctrl (see pinctrl_bind_pins, at really_probe), if the pin information is described at DT, it will show below error since the root hub's device node is the same with controller's, but controller's pin has already been requested when it is added to platform bus. imx6q-pinctrl 20e0000.iomuxc: pin MX6Q_PAD_GPIO_1 already requested by 2184000.usb; cannot claim for usb1 imx6q-pinctrl 20e0000.iomuxc: pin-137 (usb1) status -22 imx6q-pinctrl 20e0000.iomuxc: could not request pin 137 (MX6Q_PAD_GPIO_1) from group usbotggrp-3 on device 20e0000.iomuxc usb usb1: Error applying setting, reverse things back To fix this issue, we move the root hub's device node assignment (equals to contrller's) after device is added to bus, we only need to know root hub's device node information after the device under root hub is created, so this movement will not affect current function. Signed-off-by: Peter Chen Reported-by: Lars Steubesand Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd.c | 1 + drivers/usb/core/usb.c | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 980fc5774151..34b837ae1ed7 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1118,6 +1118,7 @@ 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 = parent_dev->of_node; } mutex_unlock(&usb_bus_idr_lock); diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index dcb85e3cd5a7..9cea6b0dec9c 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -472,7 +472,6 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, dev->route = 0; dev->dev.parent = bus->controller; - dev->dev.of_node = bus->controller->of_node; dev_set_name(&dev->dev, "usb%d", bus->busnum); root_hub = 1; } else { -- 2.39.5