net/mlx5: Use cpumask_available() in mlx5_eq_create_generic()

When CONFIG_CPUMASK_OFFSTACK is unset, cpumask_var_t is not a pointer
but a single element array, meaning its address in a structure cannot be
NULL as long as it is not the first element, which it is not. This
results in a clang warning:

drivers/net/ethernet/mellanox/mlx5/core/eq.c:715:14: warning: address of
array 'param->affinity' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!param->affinity)
            ~~~~~~~~^~~~~~~~
1 warning generated.

The helper cpumask_available was added in commit f7e30f01a9e2 ("cpumask:
Add helper cpumask_available()") to handle situations like this so use
it to keep the meaning of the code the same while resolving the warning.

Fixes: e4e3f24b822f ("net/mlx5: Provide cpumask at EQ creation phase")
Link: https://github.com/ClangBuiltLinux/linux/issues/1400
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index c7efd17..6e074cc 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -712,7 +712,7 @@ mlx5_eq_create_generic(struct mlx5_core_dev *dev,
        struct mlx5_eq *eq = kvzalloc(sizeof(*eq), GFP_KERNEL);
        int err;
 
-       if (!param->affinity)
+       if (!cpumask_available(param->affinity))
                return ERR_PTR(-EINVAL);
 
        if (!eq)