2 files changed, 37 insertions, 22 deletions

diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index ff123e56114a..ac91f0dfa144 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -76,6 +76,19 @@ struct top_srv {
 static struct top_srv topsrv = { 0 };
 
 /**
+ * htohl - convert value to endianness used by destination
+ * @in: value to convert
+ * @swap: non-zero if endianness must be reversed
+ *
+ * Returns converted value
+ */
+
+static u32 htohl(u32 in, int swap)
+{
+        return swap ? swab32(in) : in;
+}
+
+/**
  * subscr_send_event - send a message containing a tipc_event to the subscriber
  *
  * Note: Must not hold subscriber's server port lock, since tipc_send() will
@@ -94,11 +107,11 @@ static void subscr_send_event(struct subscription *sub,
         msg_sect.iov_base = (void *)&sub->evt;
         msg_sect.iov_len = sizeof(struct tipc_event);
 
-        sub->evt.event = htonl(event);
-        sub->evt.found_lower = htonl(found_lower);
-        sub->evt.found_upper = htonl(found_upper);
-        sub->evt.port.ref = htonl(port_ref);
-        sub->evt.port.node = htonl(node);
+        sub->evt.event = htohl(event, sub->swap);
+        sub->evt.found_lower = htohl(found_lower, sub->swap);
+        sub->evt.found_upper = htohl(found_upper, sub->swap);
+        sub->evt.port.ref = htohl(port_ref, sub->swap);
+        sub->evt.port.node = htohl(node, sub->swap);
         tipc_send(sub->server_ref, 1, &msg_sect);
 }
 
@@ -274,23 +287,16 @@ static void subscr_cancel(struct tipc_subscr *s,
 {
         struct subscription *sub;
         struct subscription *sub_temp;
-        __u32 type, lower, upper;
         int found = 0;
 
         /* Find first matching subscription, exit if not found */
 
-        type = ntohl(s->seq.type);
-        lower = ntohl(s->seq.lower);
-        upper = ntohl(s->seq.upper);
-
         list_for_each_entry_safe(sub, sub_temp, &subscriber->subscription_list,
                                  subscription_list) {
-                        if ((type == sub->seq.type) &&
-                            (lower == sub->seq.lower) &&
-                            (upper == sub->seq.upper)) {
-                                found = 1;
-                                break;
-                        }
+                if (!memcmp(s, &sub->evt.s, sizeof(struct tipc_subscr))) {
+                        found = 1;
+                        break;
+                }
         }
         if (!found)
                 return;
@@ -319,10 +325,16 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
                                              struct subscriber *subscriber)
 {
         struct subscription *sub;
+        int swap;
+
+        /* Determine subscriber's endianness */
+
+        swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE));
 
         /* Detect & process a subscription cancellation request */
 
-        if (ntohl(s->filter) & TIPC_SUB_CANCEL) {
+        if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
+                s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
                 subscr_cancel(s, subscriber);
                 return NULL;
         }
@@ -347,11 +359,11 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
 
         /* Initialize subscription object */
 
-        sub->seq.type = ntohl(s->seq.type);
-        sub->seq.lower = ntohl(s->seq.lower);
-        sub->seq.upper = ntohl(s->seq.upper);
-        sub->timeout = ntohl(s->timeout);
-        sub->filter = ntohl(s->filter);
+        sub->seq.type = htohl(s->seq.type, swap);
+        sub->seq.lower = htohl(s->seq.lower, swap);
+        sub->seq.upper = htohl(s->seq.upper, swap);
+        sub->timeout = htohl(s->timeout, swap);
+        sub->filter = htohl(s->filter, swap);
         if ((!(sub->filter & TIPC_SUB_PORTS) ==
              !(sub->filter & TIPC_SUB_SERVICE)) ||
             (sub->seq.lower > sub->seq.upper)) {
@@ -364,6 +376,7 @@ static struct subscription *subscr_subscribe(struct tipc_subscr *s,
         INIT_LIST_HEAD(&sub->nameseq_list);
         list_add(&sub->subscription_list, &subscriber->subscription_list);
         sub->server_ref = subscriber->port_ref;
+        sub->swap = swap;
         memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr));
         atomic_inc(&topsrv.subscription_count);
         if (sub->timeout != TIPC_WAIT_FOREVER) {
diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h
index c20f496d95b2..45d89bf4d202 100644
--- a/net/tipc/subscr.h
+++ b/net/tipc/subscr.h
@@ -53,6 +53,7 @@ typedef void (*tipc_subscr_event) (struct subscription *sub,
  * @nameseq_list: adjacent subscriptions in name sequence's subscription list
  * @subscription_list: adjacent subscriptions in subscriber's subscription list
  * @server_ref: object reference of server port associated with subscription
+ * @swap: indicates if subscriber uses opposite endianness in its messages
  * @evt: template for events generated by subscription
  */
 
@@ -65,6 +66,7 @@ struct subscription {
         struct list_head nameseq_list;
         struct list_head subscription_list;
         u32 server_ref;
+        int swap;
         struct tipc_event evt;
 };