Re: [linux-usb-devel] [PATCH] visor: Fix Oops on disconnect

Alan Stern
2004-05-24T13:31:21Z

On Fri, 21 May 2004, nardelli wrote:

> The api for usb_control_msg says, 'If successful, it returns 0, othwise a
> negative error number', and I didn't see any other way to figure out how
> much data was being returned.

In the current kernel sources, the kerneldoc for usb_control_msg() says
"If successful, it returns the number of bytes transferred, otherwise a
negative error number."

Alan Stern