amdgpu: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: xinhui pan <xinhui.pan@amd.com>
Cc: Evan Quan <evan.quan@amd.com>
Cc: Feifei Xu <Feifei.Xu@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

5 files changed, 17 insertions, 53 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 011630f62f85..7efc4e07665d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -967,40 +967,24 @@ static int amdgpu_ras_sysfs_remove_all(struct amdgpu_device *adev)
 /* sysfs end */
 
 /* debugfs begin */
-static int amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *adev)
+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;
-	struct dentry *root = minor->debugfs_root, *dir;
-	struct dentry *ent;
-
-	dir = debugfs_create_dir("ras", root);
-	if (IS_ERR(dir))
-		return -EINVAL;
 
-	con->dir = dir;
-
-	ent = debugfs_create_file("ras_ctrl",
-			S_IWUGO | S_IRUGO, con->dir,
-			adev, &amdgpu_ras_debugfs_ctrl_ops);
-	if (IS_ERR(ent)) {
-		debugfs_remove(con->dir);
-		return -EINVAL;
-	}
-
-	con->ent = ent;
-	return 0;
+	con->dir = debugfs_create_dir("ras", minor->debugfs_root);
+	con->ent = debugfs_create_file("ras_ctrl", S_IWUGO | S_IRUGO, con->dir,
+				       adev, &amdgpu_ras_debugfs_ctrl_ops);
 }
 
-int amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
+void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
 		struct ras_fs_if *head)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_manager *obj = amdgpu_ras_find_obj(adev, &head->head);
-	struct dentry *ent;
 
 	if (!obj || obj->ent)
-		return -EINVAL;
+		return;
 
 	get_obj(obj);
 
@@ -1008,34 +992,25 @@ int amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
 			head->debugfs_name,
 			sizeof(obj->fs_data.debugfs_name));
 
-	ent = debugfs_create_file(obj->fs_data.debugfs_name,
-			S_IWUGO | S_IRUGO, con->dir,
-			obj, &amdgpu_ras_debugfs_ops);
-
-	if (IS_ERR(ent))
-		return -EINVAL;
-
-	obj->ent = ent;
-
-	return 0;
+	obj->ent = debugfs_create_file(obj->fs_data.debugfs_name,
+				       S_IWUGO | S_IRUGO, con->dir, obj,
+				       &amdgpu_ras_debugfs_ops);
 }
 
-int amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
+void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
 		struct ras_common_if *head)
 {
 	struct ras_manager *obj = amdgpu_ras_find_obj(adev, head);
 
 	if (!obj || !obj->ent)
-		return 0;
+		return;
 
 	debugfs_remove(obj->ent);
 	obj->ent = NULL;
 	put_obj(obj);
-
-	return 0;
 }
 
-static int amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
+static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 	struct ras_manager *obj, *tmp;
@@ -1048,8 +1023,6 @@ static int amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
 	debugfs_remove(con->dir);
 	con->dir = NULL;
 	con->ent = NULL;
-
-	return 0;
 }
 /* debugfs end */
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
index 94c652f5265a..b2841195bd3b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -276,10 +276,10 @@ int amdgpu_ras_sysfs_create(struct amdgpu_device *adev,
 int amdgpu_ras_sysfs_remove(struct amdgpu_device *adev,
 		struct ras_common_if *head);
 
-int amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
+void amdgpu_ras_debugfs_create(struct amdgpu_device *adev,
 		struct ras_fs_if *head);
 
-int amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
+void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
 		struct ras_common_if *head);
 
 int amdgpu_ras_error_query(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index ba36a28da2fa..a3f1490f7307 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3904,9 +3904,7 @@ static int gfx_v9_0_ecc_late_init(void *handle)
 	if (r)
 		goto interrupt;
 
-	r = amdgpu_ras_debugfs_create(adev, &fs_info);
-	if (r)
-		goto debugfs;
+	amdgpu_ras_debugfs_create(adev, &fs_info);
 
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
@@ -3921,7 +3919,6 @@ irq:
 	amdgpu_ras_sysfs_remove(adev, *ras_if);
 sysfs:
 	amdgpu_ras_debugfs_remove(adev, *ras_if);
-debugfs:
 	amdgpu_ras_interrupt_remove_handler(adev, &ih_info);
 interrupt:
 	amdgpu_ras_feature_enable(adev, *ras_if, 0);
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 602593bab7a7..3c23de4b2e48 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -730,9 +730,7 @@ static int gmc_v9_0_ecc_late_init(void *handle)
 	if (r)
 		goto interrupt;
 
-	r = amdgpu_ras_debugfs_create(adev, &fs_info);
-	if (r)
-		goto debugfs;
+	amdgpu_ras_debugfs_create(adev, &fs_info);
 
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
@@ -747,7 +745,6 @@ irq:
 	amdgpu_ras_sysfs_remove(adev, *ras_if);
 sysfs:
 	amdgpu_ras_debugfs_remove(adev, *ras_if);
-debugfs:
 	amdgpu_ras_interrupt_remove_handler(adev, &ih_info);
 interrupt:
 	amdgpu_ras_feature_enable(adev, *ras_if, 0);
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 7a259c5b6c62..c0b6011b4bd1 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1566,9 +1566,7 @@ static int sdma_v4_0_late_init(void *handle)
 	if (r)
 		goto interrupt;
 
-	r = amdgpu_ras_debugfs_create(adev, &fs_info);
-	if (r)
-		goto debugfs;
+	amdgpu_ras_debugfs_create(adev, &fs_info);
 
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
@@ -1589,7 +1587,6 @@ irq:
 	amdgpu_ras_sysfs_remove(adev, *ras_if);
 sysfs:
 	amdgpu_ras_debugfs_remove(adev, *ras_if);
-debugfs:
 	amdgpu_ras_interrupt_remove_handler(adev, &ih_info);
 interrupt:
 	amdgpu_ras_feature_enable(adev, *ras_if, 0);