From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
Received: from shards.monkeyblade.net ([23.128.96.9]:57318 "EHLO
        shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1725734AbeIHKsV (ORCPT
        <rfc822;stable@vger.kernel.org>); Sat, 8 Sep 2018 06:48:21 -0400
Date: Fri, 07 Sep 2018 23:03:48 -0700 (PDT)
Message-Id: <20180907.230348.33221589667753465.davem@davemloft.net>
To: jgross@suse.com
Cc: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
        netdev@vger.kernel.org, boris.ostrovsky@oracle.com,
        stable@vger.kernel.org
Subject: Re: [PATCH] xen/netfront: fix waiting for xenbus state change
From: David Miller <davem@davemloft.net>
In-Reply-To: <20180907122130.30810-1-jgross@suse.com>
References: <20180907122130.30810-1-jgross@suse.com>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: stable-owner@vger.kernel.org
List-ID: <stable.vger.kernel.org>

From: Juergen Gross <jgross@suse.com>
Date: Fri,  7 Sep 2018 14:21:30 +0200

> Commit 822fb18a82aba ("xen-netfront: wait xenbus state change when load
> module manually") added a new wait queue to wait on for a state change
> when the module is loaded manually. Unfortunately there is no wakeup
> anywhere to stop that waiting.
> 
> Instead of introducing a new wait queue rename the existing
> module_unload_q to module_wq and use it for both purposes (loading and
> unloading).
> 
> As any state change of the backend might be intended to stop waiting
> do the wake_up_all() in any case when netback_changed() is called.
> 
> Fixes: 822fb18a82aba ("xen-netfront: wait xenbus state change when load module manually")
> Cc: <stable@vger.kernel.org> #4.18
> Signed-off-by: Juergen Gross <jgross@suse.com>

Applied.