Re: How to test usb interfaces for having drivers?

Alan Stern <[email protected]> Wed, 22 Aug 2007 10:28:46 -0400 (EDT)

Newsgroups	gmane.linux.usb.devel
Message-ID	<[email protected]>

On Wed, 22 Aug 2007, Oliver Neukum wrote:

> Hi,
> 
> how can I test for interfaces having drivers associated?

Test from where?  In userspace you can look at the contents of 
/proc/bus/usb/devices or you can search through the subdirectories of 
/sys/bus/usb/drivers.

Inside the kernel you can test intf->dev.driver, where intf is a struct 
usb_interface *.  This is racy unless you first call usb_lock_device().

Alan Stern

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