Re: [PATCH -next] drm/amdgpu: fix return value check in amdgpu_debugfs_ring_init()

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Am 19.07.2016 um 14:15 schrieb Wei Yongjun:
From: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>

In case of error, the function debugfs_create_*() returns NULL
pointer not ERR_PTR() if debugfs is enabled. The IS_ERR() test
in the return value check should be replaced with NULL test.
(defined(CONFIG_DEBUG_FS) make sure debugfs is enabled)

Signed-off-by: Wei Yongjun <yongjun_wei@xxxxxxxxxxxxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>.

There might be some more cases like this, we have probably copy&pasted that code multiple times.

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 3b885e3..9247ae16 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -362,8 +362,8 @@ static 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 (IS_ERR(ent))
-		return PTR_ERR(ent);
+	if (!ent)
+		return -ENOMEM;
i_size_write(ent->d_inode, ring->ring_size + 12);
  	ring->ent = ent;



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