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* [PATCH] amdgpu: no need to check return value of debugfs_create functions
@ 2019-06-13 13:19 Greg Kroah-Hartman
  0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2019-06-13 13:19 UTC (permalink / raw)
  To: Alex Deucher, Christian König, David (ChunMing) Zhou,
	David Airlie, Daniel Vetter
  Cc: Feifei Xu, dri-devel, xinhui pan, amd-gfx, Evan Quan

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>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 51 ++++++-------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h |  4 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c   |  5 +--
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c   |  5 +--
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c  |  5 +--
 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 22bd21efe6b1..1d0ef9ef35e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -833,40 +833,24 @@ 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);
 
@@ -874,34 +858,25 @@ 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;
@@ -914,8 +889,6 @@ 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 eaef5edefc34..7869ad18e7c1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.h
@@ -271,10 +271,10 @@ 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 ba67d1023264..3f6ab6052890 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3590,9 +3590,7 @@ 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)
@@ -3607,7 +3605,6 @@ static int gfx_v9_0_ecc_late_init(void *handle)
 	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 72837b8c7031..85ed9d02372c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -706,9 +706,7 @@ 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)
@@ -723,7 +721,6 @@ static int gmc_v9_0_ecc_late_init(void *handle)
 	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 9c88ce513d78..3e796787857e 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1541,9 +1541,7 @@ 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)
@@ -1564,7 +1562,6 @@ static int sdma_v4_0_late_init(void *handle)
 	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);
-- 
2.22.0

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2019-06-13 13:19 [PATCH] amdgpu: no need to check return value of debugfs_create functions Greg Kroah-Hartman

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