Introduce a helper function to get a usb_device pointer from a
comedi_device pointer.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/comedi_usb.c | 12 ++++++++++++
drivers/staging/comedi/comedidev.h | 1 +
2 files changed, 13 insertions(+)
diff --git a/drivers/staging/comedi/comedi_usb.c b/drivers/staging/comedi/comedi_usb.c
index b72da79..13f18be 100644
--- a/drivers/staging/comedi/comedi_usb.c
+++ b/drivers/staging/comedi/comedi_usb.c
@@ -31,6 +31,18 @@ struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev)
EXPORT_SYMBOL_GPL(comedi_to_usb_interface);
/**
+ * comedi_to_usb_dev() - comedi_device pointer to usb_device pointer.
+ * @dev: comedi_device struct
+ */
+struct usb_device *comedi_to_usb_dev(struct comedi_device *dev)
+{
+ struct usb_interface *intf = comedi_to_usb_interface(dev);
+
+ return intf ? interface_to_usbdev(intf) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_usb_dev);
+
+/**
* comedi_usb_auto_config() - Configure/probe a comedi USB driver.
* @intf: usb_interface struct
* @driver: comedi_driver struct
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index a31915f..ab926a6 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -491,6 +491,7 @@ struct usb_driver;
struct usb_interface;
struct usb_interface *comedi_to_usb_interface(struct comedi_device *);
+struct usb_device *comedi_to_usb_dev(struct comedi_device *);
int comedi_usb_auto_config(struct usb_interface *, struct comedi_driver *,
unsigned long context);
--
1.8.1.4
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