[PATCH] USB devio.c: deadlock fix

proc_resetdevice is called with dev->serialize held.
usb_reset_device takes dev->serialize and then calls
__usb_reset_device.  To avoid deadlock, proc_resetdevice
should call __usb_reset_device directly.
Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/usb/core/devio.c

@@ -719,7 +719,7 @@ static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 
 static int proc_resetdevice(struct dev_state *ps)
 {
-	return usb_reset_device(ps->dev);
+	return __usb_reset_device(ps->dev);
 
 }
 

include/linux/usb.h

@@ -334,6 +334,7 @@ extern void usb_put_dev(struct usb_device *dev);
 
 /* mostly for devices emulating SCSI over USB */
 extern int usb_reset_device(struct usb_device *dev);
+extern int __usb_reset_device(struct usb_device *dev);
 
 extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id);