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Diffstat (limited to 'net/rds/ib_cm.c')
-rw-r--r--net/rds/ib_cm.c43
1 files changed, 27 insertions, 16 deletions
diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
index 0532237bd12..f8e40e1a603 100644
--- a/net/rds/ib_cm.c
+++ b/net/rds/ib_cm.c
@@ -126,9 +126,7 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
err = rds_ib_update_ipaddr(rds_ibdev, conn->c_laddr);
if (err)
printk(KERN_ERR "rds_ib_update_ipaddr failed (%d)\n", err);
- err = rds_ib_add_conn(rds_ibdev, conn);
- if (err)
- printk(KERN_ERR "rds_ib_add_conn failed (%d)\n", err);
+ rds_ib_add_conn(rds_ibdev, conn);
/* If the peer gave us the last packet it saw, process this as if
* we had received a regular ACK. */
@@ -616,18 +614,8 @@ void rds_ib_conn_shutdown(struct rds_connection *conn)
/*
* Move connection back to the nodev list.
*/
- if (ic->rds_ibdev) {
-
- spin_lock_irq(&ic->rds_ibdev->spinlock);
- BUG_ON(list_empty(&ic->ib_node));
- list_del(&ic->ib_node);
- spin_unlock_irq(&ic->rds_ibdev->spinlock);
-
- spin_lock_irq(&ib_nodev_conns_lock);
- list_add_tail(&ic->ib_node, &ib_nodev_conns);
- spin_unlock_irq(&ib_nodev_conns_lock);
- ic->rds_ibdev = NULL;
- }
+ if (ic->rds_ibdev)
+ rds_ib_remove_conn(ic->rds_ibdev, conn);
ic->i_cm_id = NULL;
ic->i_pd = NULL;
@@ -648,7 +636,11 @@ void rds_ib_conn_shutdown(struct rds_connection *conn)
/* Clear the ACK state */
clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
- rds_ib_set_64bit(&ic->i_ack_next, 0);
+#ifdef KERNEL_HAS_ATOMIC64
+ atomic64_set(&ic->i_ack_next, 0);
+#else
+ ic->i_ack_next = 0;
+#endif
ic->i_ack_recv = 0;
/* Clear flow control state */
@@ -681,6 +673,9 @@ int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
INIT_LIST_HEAD(&ic->ib_node);
mutex_init(&ic->i_recv_mutex);
+#ifndef KERNEL_HAS_ATOMIC64
+ spin_lock_init(&ic->i_ack_lock);
+#endif
/*
* rds_ib_conn_shutdown() waits for these to be emptied so they
@@ -701,11 +696,27 @@ int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
return 0;
}
+/*
+ * Free a connection. Connection must be shut down and not set for reconnect.
+ */
void rds_ib_conn_free(void *arg)
{
struct rds_ib_connection *ic = arg;
+ spinlock_t *lock_ptr;
+
rdsdebug("ic %p\n", ic);
+
+ /*
+ * Conn is either on a dev's list or on the nodev list.
+ * A race with shutdown() or connect() would cause problems
+ * (since rds_ibdev would change) but that should never happen.
+ */
+ lock_ptr = ic->rds_ibdev ? &ic->rds_ibdev->spinlock : &ib_nodev_conns_lock;
+
+ spin_lock_irq(lock_ptr);
list_del(&ic->ib_node);
+ spin_unlock_irq(lock_ptr);
+
kfree(ic);
}