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xen: close evtchn port if binding to irq fails

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CC: stable@vger.kernel.org
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Wei Liu 2013-02-18 14:57:58 +00:00 committed by Konrad Rzeszutek Wilk
parent 18283ea743
commit e7e44e4448
1 changed files with 10 additions and 0 deletions
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10
drivers/xen/evtchn.c
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@ -269,6 +269,14 @@ static int evtchn_bind_to_user(struct per_user_data *u, int port)
u->name, (void *)(unsigned long)port);
if (rc >= 0)
rc = evtchn_make_refcounted(port);
else {
/* bind failed, should close the port now */
struct evtchn_close close;
close.port = port;
if (HYPERVISOR_event_channel_op(EVTCHNOP_close, &close) != 0)
BUG();
set_port_user(port, NULL);
}
return rc;
}
@ -277,6 +285,8 @@ static void evtchn_unbind_from_user(struct per_user_data *u, int port)
{
int irq = irq_from_evtchn(port);
BUG_ON(irq < 0);
unbind_from_irqhandler(irq, (void *)(unsigned long)port);
set_port_user(port, NULL);