From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Wed, 26 Feb 2003 22:27:43 +0000 Subject: Re: USB hotplug: knowing which interface you are being called for Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Wed, Feb 26, 2003 at 09:11:46PM +0100, Duncan Sands wrote: > On Wednesday 26 February 2003 18:04, Greg KH wrote: > > On Wed, Feb 26, 2003 at 04:39:36PM +0100, Duncan Sands wrote: > > > Greetings hotpluggers: when a USB device is plugged in (2.5), the > > > usb hotplugging scripts are called for each interface. I don't see a > > > convenient way to work out the interface number from the info passed > > > it, namely the path to the interface in sysfs. Any suggestions? > > > > As discussed on #kernelnewbies irc channel: > > basename $DEVPATH > > will give the interface number. Hm, you might have to search that > > result for a ":" and then use the number after that which is the > > interface number. > > > > And I'll go add endpoint info to the sysfs directory too, that should > > make your life easier, right? > > Hi Greg, thanks for looking into this. You are right about the ":" of course. > It would be nice to have all the info about the interface present in the sysfs > directory (yes, including the interface number!), i.e. the same info as in > struct usb_interface. This creates some kind of equality between probe > methods and hotplugging scripts - and why not supply the info if it exists? Ok, I just did that: http://linuxusb.bkbits.net:8080/usb-2.5/patch@1.1415 > For the endpoints, I guess you are going to have to deal with alternate > interface settings as well. I can see two methods: (1) a subdirectory for > each alt setting, containing endpoints, (2) endpoints indexed by alt setting > and endpoint number. Yeah, the endpoints aren't going to be as simple, I'll have to think about them for a bit. > By the way, how are different configurations dealt with in the sysfs tree? They really aren't supported well at all, see Oliver's patch a while ago on linux-usb-devel that added better support to the core first. thanks, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: Scholarships for Techies! Can't afford IT training? All 2003 ictp students receive scholarships. Get hands-on training in Microsoft, Cisco, Sun, Linux/UNIX, and more. www.ictp.com/training/sourceforge.asp _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel