[PATCH] drm/amd/amdgpu: fix bug fail to remove debugfs when rmmod

[Wang Hongcheng]

Some debug files are forgotten to remove at fini. Remove them
all in pci_remove.

BUG: SWDEV-129297

Signed-off-by: Wang Hongcheng <Annie.Wang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 19 +++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index c28069e4..b542191 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1250,6 +1250,8 @@ struct amdgpu_debugfs {
 int amdgpu_debugfs_add_files(struct amdgpu_device *adev,
 			     const struct drm_info_list *files,
 			     unsigned nfiles);
+int amdgpu_debugfs_cleanup(struct amdgpu_device *adev);
+
 int amdgpu_debugfs_fence_init(struct amdgpu_device *adev);
 
 #if defined(CONFIG_DEBUG_FS)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 7e40071..7594abb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3215,6 +3215,25 @@ int amdgpu_debugfs_add_files(struct amdgpu_device *adev,
 	return 0;
 }
 
+int amdgpu_debugfs_cleanup(struct amdgpu_device *adev)
+{
+	struct drm_info_node *node, *tmp;
+
+	if (!&adev->ddev->primary->debugfs_root)
+		return 0;
+
+	mutex_lock(&adev->ddev->primary->debugfs_lock);
+	list_for_each_entry_safe(node, tmp,
+		&adev->ddev->primary->debugfs_list, list) {
+		debugfs_remove(node->dent);
+		list_del(&node->list);
+		kfree(node);
+	}
+	mutex_unlock(&adev->ddev->primary->debugfs_lock);
+
+	return 0;
+}
+
 #if defined(CONFIG_DEBUG_FS)
 
 static ssize_t amdgpu_debugfs_regs_read(struct file *f, char __user *buf,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 13c91a6..4f5af93 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -594,7 +594,9 @@ static void
 amdgpu_pci_remove(struct pci_dev *pdev)
 {
 	struct drm_device *dev = pci_get_drvdata(pdev);
+	struct amdgpu_device *adev = dev->dev_private;
 
+	amdgpu_debugfs_cleanup(adev);
 	drm_dev_unregister(dev);
 	drm_dev_unref(dev);
 }
-- 
2.7.4