Re: [PATCH net-next 2/2] mlx5: fix type mismatch

[Saeed Mahameed <saeedm@mellanox.com>]

On Mon, 2019-09-09 at 21:50 +0200, Arnd Bergmann wrote:
> In mlx5, pointers to 'phys_addr_t' and 'u64' are mixed since the
> addition
> of the pool memory allocator, leading to incorrect behavior on 32-bit
> architectures and this compiler warning:
> 
> drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c:121:8:
> error: incompatible pointer types passing 'u64 *' (aka 'unsigned long
> long *') to parameter of type 'phys_addr_t *' (aka 'unsigned int *')
> [-Werror,-Wincompatible-pointer-types]
>                                    &icm_mr->dm.addr, &icm_mr-
> >dm.obj_id);
>                                    ^~~~~~~~~~~~~~~~
> include/linux/mlx5/driver.h:1092:39: note: passing argument to
> parameter 'addr' here
>                          u64 length, u16 uid, phys_addr_t *addr, u32
> *obj_id);
> 
> Change the code to use 'u64' consistently in place of 'phys_addr_t'
> to
> fix this. The alternative of using phys_addr_t more would require a
> larger
> rework.
> 
> Fixes: 29cf8febd185 ("net/mlx5: DR, ICM pool memory allocator")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Hi Arnd,

Nathan Chancellor Already submitted a patch to fix this and it is more
minimal:
https://patchwork.ozlabs.org/patch/1158177/

I would like to use that patch if it is ok with you.. 

> ---
>  drivers/infiniband/hw/mlx5/cmd.c                 | 4 ++--
>  drivers/infiniband/hw/mlx5/cmd.h                 | 4 ++--
>  drivers/infiniband/hw/mlx5/mlx5_ib.h             | 2 +-
>  drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c | 4 ++--
>  include/linux/mlx5/driver.h                      | 4 ++--
>  5 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/mlx5/cmd.c
> b/drivers/infiniband/hw/mlx5/cmd.c
> index 4937947400cd..fbcad70ef6dc 100644
> --- a/drivers/infiniband/hw/mlx5/cmd.c
> +++ b/drivers/infiniband/hw/mlx5/cmd.c
> @@ -82,7 +82,7 @@ int mlx5_cmd_modify_cong_params(struct
> mlx5_core_dev *dev,
>  	return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
>  }
>  
> -int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,
> +int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, u64 *addr,
>  			 u64 length, u32 alignment)
>  {
>  	struct mlx5_core_dev *dev = dm->dev;
> @@ -157,7 +157,7 @@ int mlx5_cmd_alloc_memic(struct mlx5_dm *dm,
> phys_addr_t *addr,
>  	return -ENOMEM;
>  }
>  
> -int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr, u64
> length)
> +int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, u64 addr, u64 length)
>  {
>  	struct mlx5_core_dev *dev = dm->dev;
>  	u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev,
> memic_bar_start_addr);
> diff --git a/drivers/infiniband/hw/mlx5/cmd.h
> b/drivers/infiniband/hw/mlx5/cmd.h
> index 169cab4915e3..2ea7a45a6abb 100644
> --- a/drivers/infiniband/hw/mlx5/cmd.h
> +++ b/drivers/infiniband/hw/mlx5/cmd.h
> @@ -44,9 +44,9 @@ int mlx5_cmd_query_cong_params(struct mlx5_core_dev
> *dev, int cong_point,
>  int mlx5_cmd_query_ext_ppcnt_counters(struct mlx5_core_dev *dev,
> void *out);
>  int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *mdev,
>  				void *in, int in_size);
> -int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, phys_addr_t *addr,
> +int mlx5_cmd_alloc_memic(struct mlx5_dm *dm, u64 *addr,
>  			 u64 length, u32 alignment);
> -int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr, u64
> length);
> +int mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, u64 addr, u64
> length);
>  void mlx5_cmd_dealloc_pd(struct mlx5_core_dev *dev, u32 pdn, u16
> uid);
>  void mlx5_cmd_destroy_tir(struct mlx5_core_dev *dev, u32 tirn, u16
> uid);
>  void mlx5_cmd_destroy_tis(struct mlx5_core_dev *dev, u32 tisn, u16
> uid);
> diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h
> b/drivers/infiniband/hw/mlx5/mlx5_ib.h
> index 2ceaef3ea3fb..476d4447f901 100644
> --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
> +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
> @@ -561,7 +561,7 @@ enum mlx5_ib_mtt_access_flags {
>  
>  struct mlx5_ib_dm {
>  	struct ib_dm		ibdm;
> -	phys_addr_t		dev_addr;
> +	u64			dev_addr;
>  	u32			type;
>  	size_t			size;
>  	union {
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c
> b/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c
> index e065c2f68f5a..ad4d7484fa63 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c
> @@ -90,7 +90,7 @@ void mlx5_dm_cleanup(struct mlx5_core_dev *dev)
>  }
>  
>  int mlx5_dm_sw_icm_alloc(struct mlx5_core_dev *dev, enum
> mlx5_sw_icm_type type,
> -			 u64 length, u16 uid, phys_addr_t *addr, u32
> *obj_id)
> +			 u64 length, u16 uid, u64 *addr, u32 *obj_id)
>  {
>  	u32 num_blocks = DIV_ROUND_UP_ULL(length,
> MLX5_SW_ICM_BLOCK_SIZE(dev));
>  	u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
> @@ -175,7 +175,7 @@ int mlx5_dm_sw_icm_alloc(struct mlx5_core_dev
> *dev, enum mlx5_sw_icm_type type,
>  EXPORT_SYMBOL_GPL(mlx5_dm_sw_icm_alloc);
>  
>  int mlx5_dm_sw_icm_dealloc(struct mlx5_core_dev *dev, enum
> mlx5_sw_icm_type type,
> -			   u64 length, u16 uid, phys_addr_t addr, u32
> obj_id)
> +			   u64 length, u16 uid, u64 addr, u32 obj_id)
>  {
>  	u32 num_blocks = DIV_ROUND_UP_ULL(length,
> MLX5_SW_ICM_BLOCK_SIZE(dev));
>  	u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)] = {};
> diff --git a/include/linux/mlx5/driver.h
> b/include/linux/mlx5/driver.h
> index 3e80f03a387f..e07f9daf7d42 100644
> --- a/include/linux/mlx5/driver.h
> +++ b/include/linux/mlx5/driver.h
> @@ -1089,9 +1089,9 @@ int mlx5_lag_query_cong_counters(struct
> mlx5_core_dev *dev,
>  struct mlx5_uars_page *mlx5_get_uars_page(struct mlx5_core_dev
> *mdev);
>  void mlx5_put_uars_page(struct mlx5_core_dev *mdev, struct
> mlx5_uars_page *up);
>  int mlx5_dm_sw_icm_alloc(struct mlx5_core_dev *dev, enum
> mlx5_sw_icm_type type,
> -			 u64 length, u16 uid, phys_addr_t *addr, u32
> *obj_id);
> +			 u64 length, u16 uid, u64 *addr, u32 *obj_id);
>  int mlx5_dm_sw_icm_dealloc(struct mlx5_core_dev *dev, enum
> mlx5_sw_icm_type type,
> -			   u64 length, u16 uid, phys_addr_t addr, u32
> obj_id);
> +			   u64 length, u16 uid, u64 addr, u32 obj_id);
>  
>  #ifdef CONFIG_MLX5_CORE_IPOIB
>  struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev
> *mdev,