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

[Andrei Borzenkov <arvidjaar@gmail.com>]

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.