linux-kernel - [PATCH v2 2/2] KVM: debugfs: Return retval of simple_attr

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Message-Id: <69d64d93accd1f33691b8a383ae555baee80f943.1665975828.git.houwenlong.hwl@antgroup.com>
Date:   Mon, 17 Oct 2022 11:06:10 +0800
From:   "Hou Wenlong" <houwenlong.hwl@...group.com>
To:     kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] KVM: debugfs: Return retval of simple_attr_open() if it fails

Although simple_attr_open() fails only with -ENOMEM with current code
base, it would be nicer to return retval of simple_attr_open() directly
in kvm_debugfs_open().

No functional change intended.

Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>
---
 virt/kvm/kvm_main.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e30f1b4ecfa5..f7b06c1e8827 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5398,6 +5398,7 @@ static int kvm_debugfs_open(struct inode *inode, struct file *file,
 			   int (*get)(void *, u64 *), int (*set)(void *, u64),
 			   const char *fmt)
 {
+	int ret;
 	struct kvm_stat_data *stat_data = (struct kvm_stat_data *)
 					  inode->i_private;
 
@@ -5409,15 +5410,13 @@ static int kvm_debugfs_open(struct inode *inode, struct file *file,
 	if (!kvm_get_kvm_safe(stat_data->kvm))
 		return -ENOENT;
 
-	if (simple_attr_open(inode, file, get,
-		    kvm_stats_debugfs_mode(stat_data->desc) & 0222
-		    ? set : NULL,
-		    fmt)) {
+	ret = simple_attr_open(inode, file, get,
+			       kvm_stats_debugfs_mode(stat_data->desc) & 0222
+			       ? set : NULL, fmt);
+	if (ret)
 		kvm_put_kvm(stat_data->kvm);
-		return -ENOMEM;
-	}
 
-	return 0;
+	return ret;
 }
 
 static int kvm_debugfs_release(struct inode *inode, struct file *file)
-- 
2.31.1