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authorChris Mason <chris.mason@oracle.com>2010-05-12 03:15:35 +0400
committerAndy Grover <andy.grover@oracle.com>2010-09-09 05:15:13 +0400
commit1cc2228c599f173d77000a250bf0541294e1a7be (patch)
treecc84662c1fd550274e8bba759074873b7c8e017d
parentbcf50ef2ce3c5d8f2fe995259da16677898cb300 (diff)
downloadlinux-1cc2228c599f173d77000a250bf0541294e1a7be.tar.xz
rds: Fix reference counting on the for xmit_atomic and xmit_rdma
This makes sure we have the proper number of references in rds_ib_xmit_atomic and rds_ib_xmit_rdma. We also consistently drop references the same way for all message types as the IOs end. Signed-off-by: Chris Mason <chris.mason@oracle.com>
-rw-r--r--net/rds/ib_send.c10
-rw-r--r--net/rds/send.c10
2 files changed, 11 insertions, 9 deletions
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 82459e52c771..209dbc6d159d 100644
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -757,6 +757,8 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op)
send->s_wr.next = NULL;
send->s_wr.wr.atomic.remote_addr = op->op_remote_addr;
send->s_wr.wr.atomic.rkey = op->op_rkey;
+ send->s_op = op;
+ rds_message_addref(container_of(send->s_op, struct rds_message, atomic));
/* map 8 byte retval buffer to the device */
ret = ib_dma_map_sg(ic->i_cm_id->device, op->op_sg, 1, DMA_FROM_DEVICE);
@@ -857,13 +859,13 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op)
for (i = 0; i < work_alloc && scat != &op->op_sg[op->op_count]; i++) {
send->s_wr.send_flags = 0;
send->s_queued = jiffies;
+ send->s_op = NULL;
rds_ib_set_wr_signal_state(ic, send, op->op_notify);
send->s_wr.opcode = op->op_write ? IB_WR_RDMA_WRITE : IB_WR_RDMA_READ;
send->s_wr.wr.rdma.remote_addr = remote_addr;
send->s_wr.wr.rdma.rkey = op->op_rkey;
- send->s_op = op;
if (num_sge > rds_ibdev->max_sge) {
send->s_wr.num_sge = rds_ibdev->max_sge;
@@ -899,6 +901,12 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op)
send = ic->i_sends;
}
+ /* give a reference to the last op */
+ if (scat == &op->op_sg[op->op_count]) {
+ prev->s_op = op;
+ rds_message_addref(container_of(op, struct rds_message, rdma));
+ }
+
if (i < work_alloc) {
rds_ib_ring_unalloc(&ic->i_send_ring, work_alloc - i);
work_alloc = i;
diff --git a/net/rds/send.c b/net/rds/send.c
index 5c6d4a0be0d7..437f1e72609c 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -233,13 +233,10 @@ restart:
/* The transport either sends the whole rdma or none of it */
if (rm->rdma.op_active && !conn->c_xmit_rdma_sent) {
- rds_message_addref(rm);
rm->m_final_op = &rm->rdma;
ret = conn->c_trans->xmit_rdma(conn, &rm->rdma);
- if (ret) {
- rds_message_put(rm);
+ if (ret)
break;
- }
conn->c_xmit_rdma_sent = 1;
/* The transport owns the mapped memory for now.
@@ -248,13 +245,10 @@ restart:
}
if (rm->atomic.op_active && !conn->c_xmit_atomic_sent) {
- rds_message_addref(rm);
rm->m_final_op = &rm->atomic;
ret = conn->c_trans->xmit_atomic(conn, &rm->atomic);
- if (ret) {
- rds_message_put(rm);
+ if (ret)
break;
- }
conn->c_xmit_atomic_sent = 1;
/* The transport owns the mapped memory for now.