usb/164090: [umodem] [patch] Add sysctl with ucom unit number

[Hans Petter Selasky]

The following reply was made to PR usb/164090; it has been noted by GNATS.

From: Hans Petter Selasky <hselasky at c2i.net>
To: Mykhaylo Yehorov <yehorov at gmail.com>
Cc: freebsd-usb at freebsd.org,
 freebsd-gnats-submit at freebsd.org
Subject: Re: usb/164090: [umodem] [patch] Add sysctl with ucom unit number
Date: Sat, 14 Jan 2012 11:45:05 +0100

 On Saturday 14 January 2012 10:51:07 Mykhaylo Yehorov wrote:
 > On Fri, Jan 13, 2012 at 22:54, Hans Petter Selasky <hselasky at c2i.net> wrote:
 > > Hi,
 > > 
 > > Could you patch ucom_set_pnpinfo_usb() instead, so that such a sysctl is
 > > created for all ucom devices, not only umodem?
 > 
 > I guess it will be necessary to remove a sysctl oid from a parent
 > sysctl tree before destroying ucom structures.
 > It's would be better to do in ucom_detach() but now there is no a
 > pointer to a parent device structure from there.
 > 
 > Now all drivers that use ucom pass a pointer to parent softc structure
 > to ucom_attach().
 > Is there any reason for this?
 > May be it's would be more useful to pass a pointer to a parent device
 > structure.
 > 
 > > Can you explain a bit more how you use this information in your scripts?
 > 
 > I've got a gps receiver and a mobile phone that supported by the umodem
 > driver. I can attach its in any order.
 > So I use sysctl to generate gpsd and ppp configs with appropriate
 > values of serial port.
 
 Ok, I see.
 
 And you cannot use the information passed through devd by 
 ucom_set_pnpinfo_usb()?
 
 --HPS