Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
drivers/usb/core/hub.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 6bf7124..6f909db 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4236,6 +4236,20 @@ void usb_queue_reset_device(struct usb_interface *iface)
}
EXPORT_SYMBOL_GPL(usb_queue_reset_device);
+/**
+ * usb_get_hub_child_device - Get the pointer of child device
+ * attached to the port which is specified by @port1.
+ *
+ * @hdev: USB device belonging to the usb hub
+ * @port1: port num to indicate which port the child device
+ * is attached to.
+ *
+ * USB drivers call this function to get hub's child device
+ * pointer.
+ *
+ * Return NULL if input param is invalid and
+ * child's usb_device pointer if non-NULL.
+ */
struct usb_device *usb_get_hub_child_device(struct usb_device *hdev,
int port1)
{
--
1.7.6.rc2.8.g28eb
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