linux-kernel - Re: Commit *driver core: emit uevents when device is bound to a driver* causes regression

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Date:   Fri, 6 Apr 2018 15:18:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Paul Menzel <pmenzel+linux-input@...gen.mpg.de>
Cc:     Michael Tokarev <mjt@....msk.ru>, linux-input@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ben Caradoc-Davies <ben@...nsient.nz>
Subject: Re: Commit *driver core: emit uevents when device is bound to a
 driver* causes regression

On Fri, Apr 06, 2018 at 02:20:40PM +0200, Paul Menzel wrote:
> Dear Linux folks,
> 
> 
> Commit 1455cf8 (driver core: emit uevents when device is bound to a
> driver) [1], introduced in Linux 4.14-rc1, causes a regression in user
> space.
> 
> After disconnecting USB devices, they are still shown as plugged in [2][3].
> 
> > I seem to be having a similar issue, but with an iPhone X using USB
> > to provide internet access. Even after the phone is disconnected, it
> > still shows up as "loaded active plugged". The only way to fix this
> > is to reboot or use a different USB port.
> 
> `git bisect` shows that commit 1455cf8 (driver core: emit uevents when
> device is bound to a driver) is at fault [4].
> 
> As user space should not break with newer Linux kernels, do you know what to
> do about that or can you think of a fix?

I thought we fixed this with follow-on patches, are you sure you are
using the latest 4.14.y kernel that has been released?

thanks,

greg k-h