[IB] umad: get rid of unused mr array

Now that ib_umad uses the new MAD sending interface, it no longer
needs its own L_Key.  So just delete the array of MRs that it keeps.

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 4 insertions, 25 deletions

diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index f5ed36c2a06c..d61f544f19e0 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -116,7 +116,6 @@ struct ib_umad_file {
         spinlock_t           recv_lock;
         wait_queue_head_t    recv_wait;
         struct ib_mad_agent *agent[IB_UMAD_MAX_AGENTS];
-        struct ib_mr        *mr[IB_UMAD_MAX_AGENTS];
 };
 
 struct ib_umad_packet {
@@ -505,29 +504,16 @@ found:
                 goto out;
         }
 
-        file->mr[agent_id] = ib_get_dma_mr(agent->qp->pd, IB_ACCESS_LOCAL_WRITE);
-        if (IS_ERR(file->mr[agent_id])) {
-                ret = -ENOMEM;
-                goto err;
-        }
-
         if (put_user(agent_id,
                      (u32 __user *) (arg + offsetof(struct ib_user_mad_reg_req, id)))) {
                 ret = -EFAULT;
-                goto err_mr;
+                ib_unregister_mad_agent(agent);
+                goto out;
         }
 
         file->agent[agent_id] = agent;
         ret = 0;
 
-        goto out;
-
-err_mr:
-        ib_dereg_mr(file->mr[agent_id]);
-
-err:
-        ib_unregister_mad_agent(agent);
-
 out:
         up_write(&file->port->mutex);
         return ret;
@@ -536,7 +522,6 @@ out:
 static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg)
 {
         struct ib_mad_agent *agent = NULL;
-        struct ib_mr *mr = NULL;
         u32 id;
         int ret = 0;
 
@@ -551,16 +536,13 @@ static int ib_umad_unreg_agent(struct ib_umad_file *file, unsigned long arg)
         }
 
         agent = file->agent[id];
-        mr    = file->mr[id];
         file->agent[id] = NULL;
 
 out:
         up_write(&file->port->mutex);
 
-        if (agent) {
+        if (agent)
                 ib_unregister_mad_agent(agent);
-                ib_dereg_mr(mr);
-        }
 
         return ret;
 }
@@ -629,10 +611,8 @@ static int ib_umad_close(struct inode *inode, struct file *filp)
         int i;
 
         for (i = 0; i < IB_UMAD_MAX_AGENTS; ++i)
-                if (file->agent[i]) {
+                if (file->agent[i])
                         ib_unregister_mad_agent(file->agent[i]);
-                        ib_dereg_mr(file->mr[i]);
-                }
 
         list_for_each_entry_safe(packet, tmp, &file->recv_list, list)
                 kfree(packet);
@@ -872,7 +852,6 @@ static void ib_umad_kill_port(struct ib_umad_port *port)
                 for (id = 0; id < IB_UMAD_MAX_AGENTS; ++id) {
                         if (!file->agent[id])
                                 continue;
-                        ib_dereg_mr(file->mr[id]);
                         ib_unregister_mad_agent(file->agent[id]);
                         file->agent[id] = NULL;
                 }