net/mlx4_core: Fix mpt_entry initialization in mlx4_mr_rereg_mem_write()

a) Previously, mlx4_mr_rereg_write filled the MPT's start
   and length with the old MPT's values.
   Fixing the initialization to take the new start and length.

b) In addition access flags in mpt_status were initialized instead of
   status due to bad boolean operation. Fixing the operation.

c) Initialization of pd_slave caused a protection error.
   Fix - removing this initialization.

d) In resource_tracker.c: Fixing vf encoding to be one-based.

Fixes: e630664c ('mlx4_core: Add helper functions to support MR re-registration')
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 9 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index d21e884a0838..78f51e103880 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -598,14 +598,11 @@ int mlx4_mr_rereg_mem_write(struct mlx4_dev *dev, struct mlx4_mr *mr,
         if (err)
                 return err;
 
-        mpt_entry->start       = cpu_to_be64(mr->iova);
-        mpt_entry->length      = cpu_to_be64(mr->size);
-        mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift);
-
-        mpt_entry->pd_flags &= cpu_to_be32(MLX4_MPT_PD_MASK |
-                                           MLX4_MPT_PD_FLAG_EN_INV);
-        mpt_entry->flags    &= cpu_to_be32(MLX4_MPT_FLAG_FREE |
-                                           MLX4_MPT_FLAG_SW_OWNS);
+        mpt_entry->start       = cpu_to_be64(iova);
+        mpt_entry->length      = cpu_to_be64(size);
+        mpt_entry->entity_size = cpu_to_be32(page_shift);
+        mpt_entry->flags    &= ~(cpu_to_be32(MLX4_MPT_FLAG_FREE |
+                                           MLX4_MPT_FLAG_SW_OWNS));
         if (mr->mtt.order < 0) {
                 mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL);
                 mpt_entry->mtt_addr = 0;
diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index c5f3dfca226b..486e3d26cd4a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -2541,7 +2541,7 @@ int mlx4_SW2HW_MPT_wrapper(struct mlx4_dev *dev, int slave,
         /* Make sure that the PD bits related to the slave id are zeros. */
         pd = mr_get_pd(inbox->buf);
         pd_slave = (pd >> 17) & 0x7f;
-        if (pd_slave != 0 && pd_slave != slave) {
+        if (pd_slave != 0 && --pd_slave != slave) {
                 err = -EPERM;
                 goto ex_abort;
         }