linux-kernel - Re: [PATCH] xen/xenbus: fix locking

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Message-ID: <35457608-52a2-18b5-de09-95b5e465ea99@oracle.com>
Date:   Thu, 5 Mar 2020 10:55:09 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org
Cc:     Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH] xen/xenbus: fix locking



On 3/5/20 5:03 AM, Juergen Gross wrote:
> Commit 060eabe8fbe726 ("xenbus/backend: Protect xenbus callback with
> lock") introduced a bug by holding a lock while calling a function
> which might schedule.
>
> Fix that by using a semaphore instead.
>
> Fixes: 060eabe8fbe726 ("xenbus/backend: Protect xenbus callback with lock")
> Signed-off-by: Juergen Gross <jgross@...e.com>
>


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