From 2b6b7d4be487bada8c727df829c25068c7b5e5a3 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Thu, 7 May 2009 21:35:13 -0700 Subject: IB/mlx4: Don't overwrite fast registration page list when posting work request The low-level mlx4 driver modified the page-list addresses for fast register work requests post send to big-endian, and set a "present" bit. This caused problems later when the consumer attempted to unmap the pages using the page-list (using the list addresses which were assumed to be still in CPU-endian order). Fix the mlx4 driver to allocate two buffers and use a private buffer for the hardware-format bus addresses. This patch fixes , an NFS/RDMA server crash. The cause of the crash was found by Vu Pham of Mellanox. The fix is along the lines suggested by Steve Wise in comment #21 in bug 1571. Signed-off-by: Jack Morgenstein Signed-off-by: Roland Dreier --- drivers/infiniband/hw/mlx4/mlx4_ib.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/infiniband/hw/mlx4/mlx4_ib.h') diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h index 9974e886b8de..8a7dd6795fa0 100644 --- a/drivers/infiniband/hw/mlx4/mlx4_ib.h +++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h @@ -86,6 +86,7 @@ struct mlx4_ib_mr { struct mlx4_ib_fast_reg_page_list { struct ib_fast_reg_page_list ibfrpl; + __be64 *mapped_page_list; dma_addr_t map; }; -- cgit v1.2.3