linux-kernel - Re: [PATCH] xen/netfront: fix waiting for xenbus state change

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Message-ID: <70297033-99c8-f5b0-a36c-652594706c1c@oracle.com>
Date:   Fri, 7 Sep 2018 09:46:21 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, netdev@...r.kernel.org
Cc:     davem@...emloft.net, stable@...r.kernel.org
Subject: Re: [PATCH] xen/netfront: fix waiting for xenbus state change

On 09/07/2018 08:21 AM, Juergen Gross wrote:
> 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@...r.kernel.org> #4.18
> Signed-off-by: Juergen Gross <jgross@...e.com>


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>