Re: [PATCH] usbutils: lsusb-t: print entries for devices with no interfaces

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Oct 13, 2023 at 11:22:12AM -0400, Alan Stern wrote:
> Not all USB devices have interfaces.  This is true in particular of
> the STMicroelectronics STEVAL-USBC2DP Type-C to DisplayPort adapter,
> as well as possibly other USB-C devices.
> 
> As a result these devices do not show up in the output from "lsusb -t",
> because the logic in print_tree_dev_interface() lists interfaces, not
> devices (as implied by the function's name).  This means that the
> output from "lsusb -t" can be inconsistent with the output from
> "lsusb", since some devices are omitted.
> 
> To fix the problem, we make the subroutine call print_usbdevice() at
> least once even if the device has no interfaces, and make the latter
> routine print a minimal description of such devices (anything that does
> not require access to the interface descriptor).
> 
> Reported-and-tested-by: Douglas Gilbert <dgilbert@interlog.com>
> Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
> Link: https://lore.kernel.org/linux-usb/70c563f1-847c-32a1-cf4d-6bf9802017ab@interlog.com/

Now applied, thanks!  I'll do a new release in a few days to get this
out to the world.

greg k-h