RDS/IB: Use SLAB_HWCACHE_ALIGN flag for kmem_cache_create()

[cascardo/linux.git] / net / rds / ib_recv.c

diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 1add097..37dab28 100644 (file)
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -353,7 +353,7 @@ out:
  *
  * -1 is returned if posting fails due to temporary resource exhaustion.
  */
-int rds_ib_recv_refill(struct rds_connection *conn, int prefill)
+void rds_ib_recv_refill(struct rds_connection *conn, int prefill)
 {
        struct rds_ib_connection *ic = conn->c_transport_data;
        struct rds_ib_recv_work *recv;
@@ -367,14 +367,12 @@ int rds_ib_recv_refill(struct rds_connection *conn, int prefill)
                if (pos >= ic->i_recv_ring.w_nr) {
                        printk(KERN_NOTICE "Argh - ring alloc returned pos=%u\n",
                                        pos);
-                       ret = -EINVAL;
                        break;
                }
 
                recv = &ic->i_recvs[pos];
                ret = rds_ib_recv_refill_one(conn, recv, prefill);
                if (ret) {
-                       ret = -1;
                        break;
                }
 
@@ -388,7 +386,6 @@ int rds_ib_recv_refill(struct rds_connection *conn, int prefill)
                               "%pI4 returned %d, disconnecting and "
                               "reconnecting\n", &conn->c_faddr,
                               ret);
-                       ret = -1;
                        break;
                }
 
@@ -401,7 +398,6 @@ int rds_ib_recv_refill(struct rds_connection *conn, int prefill)
 
        if (ret)
                rds_ib_ring_unalloc(&ic->i_recv_ring, 1);
-       return ret;
 }
 
 /*
@@ -983,18 +979,22 @@ static inline void rds_poll_cq(struct rds_ib_connection *ic,
                 * to get a recv completion _before_ the rdmacm ESTABLISHED
                 * event is processed.
                 */
-               if (rds_conn_up(conn) || rds_conn_connecting(conn)) {
+               if (wc.status == IB_WC_SUCCESS) {
+                       rds_ib_process_recv(conn, recv, wc.byte_len, state);
+               } else {
                        /* We expect errors as the qp is drained during shutdown */
-                       if (wc.status == IB_WC_SUCCESS) {
-                               rds_ib_process_recv(conn, recv, wc.byte_len, state);
-                       } else {
+                       if (rds_conn_up(conn) || rds_conn_connecting(conn))
                                rds_ib_conn_error(conn, "recv completion on "
-                                      "%pI4 had status %u, disconnecting and "
-                                      "reconnecting\n", &conn->c_faddr,
-                                      wc.status);
-                       }
+                                                 "%pI4 had status %u, disconnecting and "
+                                                 "reconnecting\n", &conn->c_faddr,
+                                                 wc.status);
                }
 
+               /*
+                * It's very important that we only free this ring entry if we've truly
+                * freed the resources allocated to the entry.  The refilling path can
+                * leak if we don't.
+                */
                rds_ib_ring_free(&ic->i_recv_ring, 1);
        }
 }
@@ -1051,13 +1051,13 @@ int __init rds_ib_recv_init(void)
 
        rds_ib_incoming_slab = kmem_cache_create("rds_ib_incoming",
                                        sizeof(struct rds_ib_incoming),
-                                       0, 0, NULL);
+                                       0, SLAB_HWCACHE_ALIGN, NULL);
        if (!rds_ib_incoming_slab)
                goto out;
 
        rds_ib_frag_slab = kmem_cache_create("rds_ib_frag",
                                        sizeof(struct rds_page_frag),
-                                       0, 0, NULL);
+                                       0, SLAB_HWCACHE_ALIGN, NULL);
        if (!rds_ib_frag_slab)
                kmem_cache_destroy(rds_ib_incoming_slab);
        else