linux-kernel - Re: [PATCH] xen: Remove unnecessary BUG_ON from __unbind_from

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Message-ID: <bbf57e79-e79c-baea-a22a-ffb57990c448@suse.com>
Date:   Fri, 22 Jun 2018 07:59:06 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Cc:     ben.hutchings@...ethink.co.uk, roger.pau@...rix.com,
        stable@...r.kernel.org
Subject: Re: [PATCH] xen: Remove unnecessary BUG_ON from __unbind_from_irq()

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@...ethink.co.uk>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: stable@...r.kernel.org

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen