[Xen-devel] [PATCH] xen: Remove unnecessary BUG_ON from __unbind_from_irq()

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

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@xxxxxxxxxxxxxxx>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
 drivers/xen/events/events_base.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 762378f..08e4af0 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -628,8 +628,6 @@ static void __unbind_from_irq(unsigned int irq)
                xen_irq_info_cleanup(info);
        }
 
-       BUG_ON(info_for_irq(irq)->type == IRQT_UNBOUND);
-
        xen_free_irq(irq);
 }
 
-- 
1.8.3.1


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