4.4-stable review patch. If anyone has any objections, please let me know.
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From: Boris Ostrovsky boris.ostrovsky@oracle.com
commit eef04c7b3786ff0c9cb1019278b6c6c2ea0ad4ff upstream.
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 Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: Juergen Gross jgross@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/xen/events/events_base.c | 2 -- 1 file changed, 2 deletions(-)
--- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -637,8 +637,6 @@ static void __unbind_from_irq(unsigned i xen_irq_info_cleanup(info); }
- BUG_ON(info_for_irq(irq)->type == IRQT_UNBOUND); - xen_free_irq(irq); }