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

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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.

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@xxxxxxx>

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

---
  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);





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