net/mlx5: Use the bitmap API to allocate bitmaps

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c

@@ -38,8 +38,7 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev)
 			    MLX5_LOG_SW_ICM_BLOCK_SIZE(dev));
 
 		dm->steering_sw_icm_alloc_blocks =
-			kcalloc(BITS_TO_LONGS(steering_icm_blocks),
-				sizeof(unsigned long), GFP_KERNEL);
+			bitmap_zalloc(steering_icm_blocks, GFP_KERNEL);
 		if (!dm->steering_sw_icm_alloc_blocks)
 			goto err_steering;
 	}
@@ -50,8 +49,7 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev)
 			    MLX5_LOG_SW_ICM_BLOCK_SIZE(dev));
 
 		dm->header_modify_sw_icm_alloc_blocks =
-			kcalloc(BITS_TO_LONGS(header_modify_icm_blocks),
-				sizeof(unsigned long), GFP_KERNEL);
+			bitmap_zalloc(header_modify_icm_blocks, GFP_KERNEL);
 		if (!dm->header_modify_sw_icm_alloc_blocks)
 			goto err_modify_hdr;
 	}
@@ -66,8 +64,7 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev)
 			    MLX5_LOG_SW_ICM_BLOCK_SIZE(dev));
 
 		dm->header_modify_pattern_sw_icm_alloc_blocks =
-			kcalloc(BITS_TO_LONGS(header_modify_pattern_icm_blocks),
-				sizeof(unsigned long), GFP_KERNEL);
+			bitmap_zalloc(header_modify_pattern_icm_blocks, GFP_KERNEL);
 		if (!dm->header_modify_pattern_sw_icm_alloc_blocks)
 			goto err_pattern;
 	}
@@ -75,10 +72,10 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev)
 	return dm;
 
 err_pattern:
-	kfree(dm->header_modify_sw_icm_alloc_blocks);
+	bitmap_free(dm->header_modify_sw_icm_alloc_blocks);
 
 err_modify_hdr:
-	kfree(dm->steering_sw_icm_alloc_blocks);
+	bitmap_free(dm->steering_sw_icm_alloc_blocks);
 
 err_steering:
 	kfree(dm);
@@ -97,7 +94,7 @@ void mlx5_dm_cleanup(struct mlx5_core_dev *dev)
 		WARN_ON(!bitmap_empty(dm->steering_sw_icm_alloc_blocks,
 				      BIT(MLX5_CAP_DEV_MEM(dev, log_steering_sw_icm_size) -
 					  MLX5_LOG_SW_ICM_BLOCK_SIZE(dev))));
-		kfree(dm->steering_sw_icm_alloc_blocks);
+		bitmap_free(dm->steering_sw_icm_alloc_blocks);
 	}
 
 	if (dm->header_modify_sw_icm_alloc_blocks) {
@@ -105,7 +102,7 @@ void mlx5_dm_cleanup(struct mlx5_core_dev *dev)
 				      BIT(MLX5_CAP_DEV_MEM(dev,
 							   log_header_modify_sw_icm_size) -
 				      MLX5_LOG_SW_ICM_BLOCK_SIZE(dev))));
-		kfree(dm->header_modify_sw_icm_alloc_blocks);
+		bitmap_free(dm->header_modify_sw_icm_alloc_blocks);
 	}
 
 	if (dm->header_modify_pattern_sw_icm_alloc_blocks) {
@@ -113,7 +110,7 @@ void mlx5_dm_cleanup(struct mlx5_core_dev *dev)
 				      BIT(MLX5_CAP_DEV_MEM(dev,
 							   log_header_modify_pattern_sw_icm_size) -
 					  MLX5_LOG_SW_ICM_BLOCK_SIZE(dev))));
-		kfree(dm->header_modify_pattern_sw_icm_alloc_blocks);
+		bitmap_free(dm->header_modify_pattern_sw_icm_alloc_blocks);
 	}
 
 	kfree(dm);