Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751805AbdDAQUO (ORCPT ); Sat, 1 Apr 2017 12:20:14 -0400 Received: from mail-pg0-f67.google.com ([74.125.83.67]:33072 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751574AbdDAQUM (ORCPT ); Sat, 1 Apr 2017 12:20:12 -0400 Date: Sat, 1 Apr 2017 09:20:08 -0700 From: Dmitry Torokhov To: Brian Norris Cc: Amitkumar Karwar , Nishant Sarmukadam , Kalle Valo , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Jeffy Chen Subject: Re: [RFC PATCH] Revert "mwifiex: fix system hang problem after resume" Message-ID: <20170401162008.GA17130@dtor-ws> References: <20170331202136.100342-1-briannorris@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170331202136.100342-1-briannorris@chromium.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1755 Lines: 49 On Fri, Mar 31, 2017 at 01:21:36PM -0700, Brian Norris wrote: > This reverts commit 437322ea2a36d112e20aa7282c869bf924b3a836. > > This above-mentioned "fix" does not actually do anything to prevent a > race condition. It simply papers over it so that the issue doesn't > appear. > > If this is a real problem, it should be explained better than the above > commit does, and an alternative, non-racy solution should be found. > > For further reason to revert this: there's ot reason we can't try > resetting the card when it's *actually* stuck in host-sleep mode. So > instead, this is unnecessarily creating scenarios where we can't recover > Wifi. > > Cc: Amitkumar Karwar > Signed-off-by: Brian Norris FWIW: Reviewed-by: Dmitry Torokhov > --- > Amit, please take a look. AIUI, your "fix" is wrong, and quite racy. If you > still think it's needed, can you please propose an alternative? Or at least > explain more why this is needed? Thanks. > > drivers/net/wireless/marvell/mwifiex/init.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c > index 756948385b60..0dab77b526de 100644 > --- a/drivers/net/wireless/marvell/mwifiex/init.c > +++ b/drivers/net/wireless/marvell/mwifiex/init.c > @@ -60,7 +60,7 @@ static void wakeup_timer_fn(unsigned long data) > adapter->hw_status = MWIFIEX_HW_STATUS_RESET; > mwifiex_cancel_all_pending_cmd(adapter); > > - if (adapter->if_ops.card_reset && !adapter->hs_activated) > + if (adapter->if_ops.card_reset) > adapter->if_ops.card_reset(adapter); > } > > -- > 2.12.2.564.g063fe858b8-goog > -- Dmitry