On 9/3/24 7:39 AM, Li Zetao wrote:
> Since the debugfs_create_dir() never returns a null pointer, checking
> the return value for a null pointer is redundant, and using IS_ERR is
> safe enough.
>
> Signed-off-by: Li Zetao <lizet...@huawei.com>
Reviewed-by: Dave Jiang <dave.ji...@intel.com>
> ---
> drivers/nvdimm/btt.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
> index 423dcd190906..4592c86d5eac 100644
> --- a/drivers/nvdimm/btt.c
> +++ b/drivers/nvdimm/btt.c
> @@ -227,7 +227,7 @@ static void arena_debugfs_init(struct arena_info *a,
> struct dentry *parent,
>
> snprintf(dirname, 32, "arena%d", idx);
> d = debugfs_create_dir(dirname, parent);
> - if (IS_ERR_OR_NULL(d))
> + if (IS_ERR(d))
> return;
> a->debugfs_dir = d;
>
> @@ -1703,7 +1703,7 @@ static int __init nd_btt_init(void)
> int rc = 0;
>
> debugfs_root = debugfs_create_dir("btt", NULL);
> - if (IS_ERR_OR_NULL(debugfs_root))
> + if (IS_ERR(debugfs_root))
> rc = -ENXIO;
>
> return rc;
