From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrei Borzenkov Subject: Re: Regression with dell-rbtn: radio killed on resume after suspend to RAM Date: Sun, 22 Nov 2015 09:23:19 +0300 Message-ID: <56515F57.8060801@gmail.com> References: <5650BE8E.2080506@gmail.com> <201511212008.46761@pali> <5650D693.6050808@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail-lf0-f50.google.com ([209.85.215.50]:32979 "EHLO mail-lf0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750914AbbKVGXX (ORCPT ); Sun, 22 Nov 2015 01:23:23 -0500 Received: by lfaz4 with SMTP id z4so90780044lfa.0 for ; Sat, 21 Nov 2015 22:23:22 -0800 (PST) In-Reply-To: <5650D693.6050808@gmail.com> Sender: platform-driver-x86-owner@vger.kernel.org List-ID: To: =?UTF-8?Q?Pali_Roh=c3=a1r?= Cc: platform-driver-x86@vger.kernel.org, mjg59@srcf.ucam.org, Gabriele Mazzotta , dvhart@infradead.org 21.11.2015 23:39, Andrei Borzenkov =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > 21.11.2015 22:08, Pali Roh=C3=A1r =D0=BF=D0=B8=D1=88=D0=B5=D1=82: >> On Saturday 21 November 2015 19:57:18 Andrei Borzenkov wrote: >>> After installing 4.2 on Dell Latitude E5450 I found that wireless w= as >>> 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 relat= ed >>> bug report: https://bbs.archlinux.org/viewtopic.php?id=3D203404. I >>> myself hit it on Ubuntu. >>> >>> I am not familiar with other models, but E5450 does have DELLABCE a= nd >>> so is using dell-rbtn driver. >>> >>> I am happy to test patches if need. Please let me know if formal bu= g >>> report is required. >>> >>> -andrei >> >> Hi Andrei! >> >> About five hours ago Gabriele sent patch which fixing this problem t= o >> 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=20 radio, and also several later attempts to suspend/resume. Then last tim= e=20 I suddenly got radio working again after resume. Patch looks racy; there is no guarantee we get notification before=20 resetting in suspend flag.