Am 04.08.2016 um 17:42 schrieb Amitoj Kaur Chawla:
To indicate an error, debugfs_create_file can return an ERR_PTR for
!CONFIG_DEBUG_FS and NULL otherwise, so in case the result is
dereferenced there should be a previous IS_ERR and a NULL check.
The Coccinelle semantic patch used to find the issue is as follows:
@@
expression e;
identifier f;
@@
* e = debugfs_create_file(...);
... when != e == NULL
e->f
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@xxxxxxxxx>
The whole section is surrounded by CONFIG_DEBUG_FS, so I suggest to just
replace the check or IS_ERR with a NULL check.
Regards,
Christian.
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8a1752f..9ff70a7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1198,6 +1198,8 @@ static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
adev, &amdgpu_ttm_vram_fops);
if (IS_ERR(ent))
return PTR_ERR(ent);
+ if (!ent)
+ return -ENOMEM;
i_size_write(ent->d_inode, adev->mc.mc_vram_size);
adev->mman.vram = ent;
@@ -1205,6 +1207,8 @@ static int amdgpu_ttm_debugfs_init(struct amdgpu_device *adev)
adev, &amdgpu_ttm_gtt_fops);
if (IS_ERR(ent))
return PTR_ERR(ent);
+ if (!ent)
+ return -ENOMEM;
i_size_write(ent->d_inode, adev->mc.gtt_size);
adev->mman.gtt = ent;
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