[Xen-changelog] [xen-unstable] [XEN] [ACM] Simplify the event channel scanning

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1172607756 0
# Node ID d4cd2c70cdea8fac11817b46f68c07514754da00
# Parent  69dec539c19f31c81e27cb16bad0a91e19eca39f
[XEN] [ACM] Simplify the event channel scanning

This patch simplifies the scanning of a domain's event channels
considering that an 'ECS_UNBOUND' event channel is not connected and
can be skipped.

Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxx>
---
 xen/acm/acm_simple_type_enforcement_hooks.c |   18 ++----------------
 1 files changed, 2 insertions(+), 16 deletions(-)

diff -r 69dec539c19f -r d4cd2c70cdea xen/acm/acm_simple_type_enforcement_hooks.c
--- a/xen/acm/acm_simple_type_enforcement_hooks.c       Tue Feb 27 16:13:08 
2007 +0000
+++ b/xen/acm/acm_simple_type_enforcement_hooks.c       Tue Feb 27 20:22:36 
2007 +0000
@@ -193,28 +193,14 @@ ste_init_state(struct acm_ste_policy_buf
         /* a) check for event channel conflicts */
         for (port=0; port < NR_EVTCHN_BUCKETS; port++) {
             spin_lock(&d->evtchn_lock);
-            if (d->evtchn[port] == NULL) {
+            if (d->evtchn[port] == NULL ||
+                d->evtchn[port]->state == ECS_UNBOUND) {
                 spin_unlock(&d->evtchn_lock);
                 continue;
             }
             if (d->evtchn[port]->state == ECS_INTERDOMAIN) {
                 rdom = d->evtchn[port]->u.interdomain.remote_dom;
                 rdomid = rdom->domain_id;
-                /* rdom now has remote domain */
-                ste_rssid = GET_SSIDP(ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY, 
-                                      (struct acm_ssid_domain *)(rdom->ssid));
-                ste_rssidref = ste_rssid->ste_ssidref;
-            } else if (d->evtchn[port]->state == ECS_UNBOUND) {
-                rdomid = d->evtchn[port]->u.unbound.remote_domid;
-                if ((rdom = get_domain_by_id(rdomid)) == NULL) {
-                    printk("%s: Error finding domain to id %x!\n", __func__, 
rdomid);
-                    goto out;
-                }
-                /* rdom now has remote domain */
-                ste_rssid = GET_SSIDP(ACM_SIMPLE_TYPE_ENFORCEMENT_POLICY, 
-                                      (struct acm_ssid_domain *)(rdom->ssid));
-                ste_rssidref = ste_rssid->ste_ssidref;
-                put_domain(rdom);
             } else {
                 spin_unlock(&d->evtchn_lock);
                 continue; /* port unused */

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