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IB/iser: add unlikely checks in the fast path 

ib_post_send, ib_post_recv and ib_dma_map_sg  operations should succeed
unless something unusual happened to the ib device.

Link: https://lore.kernel.org/r/1569274369-29217-1-git-send-email-maxg@mellanox.com
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Max Gurtovoy 2019-09-24 00:32:49 +03:00 committed by Jason Gunthorpe
parent 663912a637
commit 70bcc63f84
2 changed files with 3 additions and 3 deletions
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2
drivers/infiniband/ulp/iser/iser_memory.c
View File

@ -170,7 +170,7 @@ int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
dev = iser_task->iser_conn->ib_conn.device->ib_device;
data->dma_nents = ib_dma_map_sg(dev, data->sg, data->size, dma_dir);
if (data->dma_nents == 0) {
if (unlikely(data->dma_nents == 0)) {
iser_err("dma_map_sg failed!!!\n");
return -EINVAL;
}

4
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@ -1019,7 +1019,7 @@ int iser_post_recvm(struct iser_conn *iser_conn, int count)
ib_conn->post_recv_buf_count += count;
ib_ret = ib_post_recv(ib_conn->qp, ib_conn->rx_wr, NULL);
if (ib_ret) {
if (unlikely(ib_ret)) {
iser_err("ib_post_recv failed ret=%d\n", ib_ret);
ib_conn->post_recv_buf_count -= count;
} else
@ -1060,7 +1060,7 @@ int iser_post_send(struct ib_conn *ib_conn, struct iser_tx_desc *tx_desc,
first_wr = wr;
ib_ret = ib_post_send(ib_conn->qp, first_wr, NULL);
if (ib_ret)
if (unlikely(ib_ret))
iser_err("ib_post_send failed, ret:%d opcode:%d\n",
ib_ret, wr->opcode);