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Subject: [Bug 224454] Feature request: implement libusb_get_parent and
 libusb_has_capability
Date: Tue, 19 Dec 2017 15:28:09 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224454

Hans Petter Selasky <hselasky@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hselasky@FreeBSD.org

--- Comment #1 from Hans Petter Selasky <hselasky@FreeBSD.org> ---
Hi,

Can you suggest a patch to implement them in FreeBSD 12-current?

/usr/src/lib/libusb

I'm uncertain if the functions you mention are useful to FreeBSD in general
including ports, or if it is better to stub them in the code where these
functions are used.

The function to get the parent USB device must be re-constructed in userspa=
ce
by using the information obtained from:

/usr/include/libusb20.h:uint8_t libusb20_dev_get_parent_address(struct
libusb20_device *pdev);

Also this introduce a couple of races, like what to do if the parent USB de=
vice
vanishes, refcounts and so on.

--HPS

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