2011/10/26 Greg KH <gregkh@xxxxxxx>: > On Wed, Oct 26, 2011 at 01:29:42PM +0200, Bart Hartgers wrote: >> Hi, >> >> This patch for the usb serial ark3116 driver fixes an initialisation >> ordering bug that gets triggered on hotplug when using at least recent >> debian/ubuntu userspace. Without it, ark3116 serial cables don't work. >> >> Patch is against 3.1. > > Should this also be backported to older kernels? When did this problem > first show up? > The problem is triggered by a combination of the new driver (>=2.6.34) and recent-ish userspace versions. I do not know exactly what userspace bit causes the bug to happen. I got the first bug reports in the past weeks/month from people using debian-testing and arch-linux, using kernel 3.0. I could not reproduce the problem on ubuntu 11.04 (2.6.38&3.0), but fortunately, it triggered when I upgraded to ubuntu 11.10 (3.0) ;-). So backporting it to 3.0 and perhaps 2.6.3[89] will definitely be good. For older kernels it is only needed if they are used in combination with more modern userspace. Groeten, Bart -- Bart Hartgers - New e-mail: bart.hartgers@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
