net/mlx5: Use u16 for Work Queue buffer strides offset

Minimal stride size is 16.
Hence, the number of strides in a fragment (of PAGE_SIZE)
is <= PAGE_SIZE / 16 <= 4K.

u16 is sufficient to represent this.

Fixes: d7037ad7 ("net/mlx5: Fix QP fragmented buffer allocation")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/wq.c

@@ -138,7 +138,7 @@ int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
 		      void *qpc, struct mlx5_wq_qp *wq,
 		      struct mlx5_wq_ctrl *wq_ctrl)
 {
-	u32 sq_strides_offset;
+	u16 sq_strides_offset;
 	u32 rq_pg_remainder;
 	int err;
 

include/linux/mlx5/driver.h

@@ -363,7 +363,7 @@ struct mlx5_frag_buf_ctrl {
 	struct mlx5_frag_buf	frag_buf;
 	u32			sz_m1;
 	u16			frag_sz_m1;
-	u32			strides_offset;
+	u16			strides_offset;
 	u8			log_sz;
 	u8			log_stride;
 	u8			log_frag_strides;
@@ -995,7 +995,7 @@ static inline u32 mlx5_base_mkey(const u32 key)
 }
 
 static inline void mlx5_fill_fbc_offset(u8 log_stride, u8 log_sz,
-					u32 strides_offset,
+					u16 strides_offset,
 					struct mlx5_frag_buf_ctrl *fbc)
 {
 	fbc->log_stride = log_stride;