[Mageia-dev] dropping /proc/bus/sub (Re: [changelog] [RPM] cauldron core/release systemd-189-2.mga3)

[Thierry Vignaud]

On 29 August 2012 16:16, Thierry Vignaud <thierry.vignaud at gmail.com> wrote:
>>>>> Yeah because we're now on kernel 3.5 we can no longer do certain things
>>>>> relating to this mount point.
>>>>>
>>>>> IIRC some ldetect stuff used it and some of the 3G and/or
>>>>> printer/scanner stuff might also depend on it and need to be migrated
>>>>> too. I don't know that code very well, but I know some folks complained
>>>>> when we stopped mounting it by default, so I've no doubt that it's use
>>>>> is lurking somewhere!
>>>>>
>>>>> I would guess that in some cases /dev/bus/usb/ might be sufficient for
>>>>> what is needed.
>>>>
>>>> Humm...
>>>> I've still around a patch making ldetect using libusb.
>>>> Sadly, we're missing some data...
>>>> Basically we would miss the kernel driver name binded with each usb device.
>>>>
>>>> We cannot workaround it since libusb misses with the ability to either
>>>> query the sysfs device path or to got the Port number
>>>> ("Port" in /proc/bus/usb/devices).
>>>> (I miss the Port number in order to compute the
>>>> /sys/bus/devices/usb/foobar path)
>>>>
>>>> W/o that I cannot retrieve the modalias which would help me to get the kernel
>>>> driver name.
>>>>
>>>> I guess I'll have to resurect that work and try harder to find some
>>>> workaround...
>>>
>>> Why not using sysfs for everything directly?

(...)

> See also http://sourceforge.net/apps/trac/libusbx/ticket/24

I've put a simple fix at https://bugs.mageia.org/show_bug.cgi?id=7248