UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

net/mlx5: FPGA, Call DMA unmap with the right size 

When mlx5_fpga_conn_unmap_buf is called buf->sg[0].size
should equal the actual buffer size, not the message size.
Otherwise we will trigger the following dma debug warning
"DMA-API: device driver frees DMA memory with different size"

Fixes: 537a505741 ('net/mlx5: FPGA, Add high-speed connection routines')
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Ilya Lesokhin 2017-08-28 09:47:32 +03:00 committed by Saeed Mahameed
parent ba869ee0e0
commit 36dd490200
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c
View File

@ -256,8 +256,6 @@ static void mlx5_fpga_conn_rq_cqe(struct mlx5_fpga_conn *conn,
ix = be16_to_cpu(cqe->wqe_counter) & (conn->qp.rq.size - 1); ix = be16_to_cpu(cqe->wqe_counter) & (conn->qp.rq.size - 1);
buf = conn->qp.rq.bufs[ix]; buf = conn->qp.rq.bufs[ix];
conn->qp.rq.bufs[ix] = NULL; conn->qp.rq.bufs[ix] = NULL;
if (!status)
buf->sg[0].size = be32_to_cpu(cqe->byte_cnt);
conn->qp.rq.cc++; conn->qp.rq.cc++;
if (unlikely(status && (status != MLX5_CQE_SYNDROME_WR_FLUSH_ERR))) if (unlikely(status && (status != MLX5_CQE_SYNDROME_WR_FLUSH_ERR)))
@ -275,6 +273,7 @@ static void mlx5_fpga_conn_rq_cqe(struct mlx5_fpga_conn *conn,
return; return;
} }
buf->sg[0].size = be32_to_cpu(cqe->byte_cnt);
mlx5_fpga_dbg(conn->fdev, "Message with %u bytes received successfully\n", mlx5_fpga_dbg(conn->fdev, "Message with %u bytes received successfully\n",
buf->sg[0].size); buf->sg[0].size);
conn->recv_cb(conn->cb_arg, buf); conn->recv_cb(conn->cb_arg, buf);