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Subject: Re: [PATCH] xen: Remove unnecessary BUG_ON from __unbind_from_irq()
To:     Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org
Cc:     ben.hutchings@codethink.co.uk, roger.pau@citrix.com,
        stable@vger.kernel.org
References: <1529602184-2861-1-git-send-email-boris.ostrovsky@oracle.com>
From:   Juergen Gross <jgross@suse.com>
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Date:   Fri, 22 Jun 2018 08:34:28 +0200
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On 21/06/18 19:29, Boris Ostrovsky wrote:
> Commit 910f8befdf5b ("xen/pirq: fix error path cleanup when binding
> MSIs") fixed a couple of errors in error cleanup path of
> xen_bind_pirq_msi_to_irq(). This cleanup allowed a call to
> __unbind_from_irq() with an unbound irq, which would result in
> triggering the BUG_ON there.
> 
> Since there is really no reason for the BUG_ON (xen_free_irq() can
> operate on unbound irqs) we can remove it.
> 
> Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: stable@vger.kernel.org

Pushed to xen/tip.git for-linus-4.18


Juergen