On Tue, 3 Feb 2009, Jean-Francois Moine wrote:

> > Perhaps we also need to do what Adam suggested yesterday, and add a
> > call to destroy_urbs() in gspca_disconnect()?
> 
> Surely not! The destroy_urbs() must be called at the right time, i.e.
> on close().

Theodore was pointing out that destroy_urbs() must also be called 
during disconnect.  If a camera is unplugged while it is in use then 
waiting until close() is no good -- it will cause destroy_urbs() to 
pass a stale pointer to usb_buffer_free().  That's the reason for the 
oops.

Alan Stern

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