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-rw-r--r--net/tipc/discover.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index bc849f1..412ff41 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -50,6 +50,7 @@
* @dest: destination address for request messages
* @domain: network domain to which links can be established
* @num_nodes: number of nodes currently discovered (i.e. with an active link)
+ * @lock: spinlock for controlling access to requests
* @buf: request message to be (repeatedly) sent
* @timer: timer governing period between requests
* @timer_intv: current interval between requests (in ms)
@@ -59,6 +60,7 @@ struct tipc_link_req {
struct tipc_media_addr dest;
u32 domain;
int num_nodes;
+ spinlock_t lock;
struct sk_buff *buf;
struct timer_list timer;
unsigned int timer_intv;
@@ -274,7 +276,9 @@ static void disc_update(struct tipc_link_req *req)
*/
void tipc_disc_add_dest(struct tipc_link_req *req)
{
+ spin_lock_bh(&req->lock);
req->num_nodes++;
+ spin_unlock_bh(&req->lock);
}
/**
@@ -283,8 +287,10 @@ void tipc_disc_add_dest(struct tipc_link_req *req)
*/
void tipc_disc_remove_dest(struct tipc_link_req *req)
{
+ spin_lock_bh(&req->lock);
req->num_nodes--;
disc_update(req);
+ spin_unlock_bh(&req->lock);
}
/**
@@ -297,7 +303,7 @@ static void disc_timeout(struct tipc_link_req *req)
{
int max_delay;
- spin_lock_bh(&req->bearer->lock);
+ spin_lock_bh(&req->lock);
/* Stop searching if only desired node has been found */
if (tipc_node(req->domain) && req->num_nodes) {
@@ -325,7 +331,7 @@ static void disc_timeout(struct tipc_link_req *req)
k_start_timer(&req->timer, req->timer_intv);
exit:
- spin_unlock_bh(&req->bearer->lock);
+ spin_unlock_bh(&req->lock);
}
/**
@@ -356,6 +362,7 @@ int tipc_disc_create(struct tipc_bearer *b_ptr, struct tipc_media_addr *dest,
req->domain = dest_domain;
req->num_nodes = 0;
req->timer_intv = TIPC_LINK_REQ_INIT;
+ spin_lock_init(&req->lock);
k_init_timer(&req->timer, (Handler)disc_timeout, (unsigned long)req);
k_start_timer(&req->timer, req->timer_intv);
b_ptr->link_req = req;
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