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

[Sharma, Shashank]

On 9/3/2021 1:47 PM, Christian König wrote:
> Yeah, sounds logical to me as well. Feel free to stick my rb on that as 
> well.
> 
> Christian.
> 
> Am 03.09.21 um 10:13 schrieb Das, Nirmoy:
>> Hi Christian and Shashank,
>>
>>
>> Please review the v2 : https://patchwork.freedesktop.org/patch/452175/
>>
>> In v2, I am returning "PTR_ERR(ent)" instead of -EIO which I think 
>> makes more sense.

Agree, LGTM as well,
Reviewed-By: Shashank Sharma <shashank.sharma at amd.com>


Regards
Shashank

>>
>> Regards,
>> Nirmoy
>>
>> On 9/3/2021 9:53 AM, Christian König wrote:
>>> 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 at amd.com>
>>>
>>> Reviewed-by: Christian König <christian.koenig at 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);
>>>
>