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authorWei Liu <wei.liu2@citrix.com>2013-02-18 18:57:58 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2013-02-20 07:02:33 +0400
commite7e44e444876478d50630f57b0c31d29f6725020 (patch)
tree8b99f3a80c5ceaba647c5b64f59b0a1b5d5927d7 /drivers/xen/evtchn.c
parent18283ea7433c703d3fcce33d189b637a7aaf0a49 (diff)
downloadlinux-e7e44e444876478d50630f57b0c31d29f6725020.tar.xz
xen: close evtchn port if binding to irq fails
CC: stable@vger.kernel.org Signed-off-by: Wei Liu <wei.liu2@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/evtchn.c')
-rw-r--r--drivers/xen/evtchn.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 4ebd501f1f80..45c8efaa6b3e 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -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);