Re: Regression with dell-rbtn: radio killed on resume after suspend to RAM

["Pali Rohár" <pali.rohar@gmail.com>]

On Sunday 22 November 2015 09:23:19 Andrei Borzenkov wrote:
> 21.11.2015 23:39, Andrei Borzenkov пишет:
> >21.11.2015 22:08, Pali Rohár пишет:
> >>On Saturday 21 November 2015 19:57:18 Andrei Borzenkov wrote:
> >>>After installing 4.2 on Dell Latitude E5450 I found that wireless was
> >>>disabled every second resume from suspend to RAM. Blacklisting
> >>>dell-rbtn "fixed" it.
> >>>
> >>>This is probably the same as discussed in this Arch forum and related
> >>>bug report: https://bbs.archlinux.org/viewtopic.php?id=203404. I
> >>>myself hit it on Ubuntu.
> >>>
> >>>I am not familiar with other models, but E5450 does have DELLABCE and
> >>>so is using dell-rbtn driver.
> >>>
> >>>I am happy to test patches if need. Please let me know if formal bug
> >>>report is required.
> >>>
> >>>-andrei
> >>
> >>Hi Andrei!
> >>
> >>About five hours ago Gabriele sent patch which fixing this problem to
> >>LKML. You can find it on: https://lkml.org/lkml/2015/11/21/57
> >>
> >>Can you test that patch and confirm it fix also for you?
> >>
> >
> >Yes, it does.
> 
> Unfortunately it was too early. Today after resume I again got disable
> radio, and also several later attempts to suspend/resume. Then last time I
> suddenly got radio working again after resume.
> 
> Patch looks racy; there is no guarantee we get notification before resetting
> in suspend flag.
> 

Gabriele, any idea how to fix this?

-- 
Pali Rohár
pali.rohar@gmail.com