[PATCH] drm/amdgpu: check for the existence of RAS dir before creating

[Evan Quan]

To address the error message below:
debugfs: Directory 'ras' with parent '/' already present!

Change-Id: I2539e89fdfe4e22055c3be5a48a8c0adad315f91
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index e1e8fd4b2b89..2195f6c63b50 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1075,7 +1075,9 @@ static void amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct drm_minor *minor = adev->ddev->primary;
 
-	con->dir = debugfs_create_dir("ras", minor->debugfs_root);
+	con->dir = debugfs_lookup("ras", minor->debugfs_root);
+	if (!con->dir)
+		con->dir = debugfs_create_dir("ras", minor->debugfs_root);
 	debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, con->dir,
 				adev, &amdgpu_ras_debugfs_ctrl_ops);
 	debugfs_create_file("ras_eeprom_reset", S_IWUGO | S_IRUGO, con->dir,
-- 
2.25.1