Re: [PATCH 1/2] drm/amdgpu: use IS_ERR for debugfs APIs

["Christian König" <christian.koenig@amd.com>]

Am 02.09.21 um 13:44 schrieb Nirmoy Das:
> debugfs APIs returns encoded error so use
> IS_ERR for checking return value.
>
> References: https://gitlab.freedesktop.org/drm/amd/-/issues/1686
> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 6 ++----
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c    | 2 +-
>   2 files changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> index d256215ab2c7..077f9baf74fe 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -1696,18 +1696,16 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
>   	struct dentry *ent;
>   	int r, i;
>   
> -
> -
>   	ent = debugfs_create_file("amdgpu_preempt_ib", 0600, root, adev,
>   				  &fops_ib_preempt);
> -	if (!ent) {
> +	if (IS_ERR(ent)) {
>   		DRM_ERROR("unable to create amdgpu_preempt_ib debugsfs file\n");
>   		return -EIO;
>   	}
>   
>   	ent = debugfs_create_file("amdgpu_force_sclk", 0200, root, adev,
>   				  &fops_sclk_set);
> -	if (!ent) {
> +	if (IS_ERR(ent)) {
>   		DRM_ERROR("unable to create amdgpu_set_sclk debugsfs file\n");
>   		return -EIO;
>   	}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
> index 7b634a1517f9..f40753e1a60d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
> @@ -428,7 +428,7 @@ int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
>   	ent = debugfs_create_file(name,
>   				  S_IFREG | S_IRUGO, root,
>   				  ring, &amdgpu_debugfs_ring_fops);
> -	if (!ent)
> +	if (IS_ERR(ent))
>   		return -ENOMEM;
>   
>   	i_size_write(ent->d_inode, ring->ring_size + 12);