linux-kernel - [PATCH -next 2/3] fail_function: refctor code of checking return value of register

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Date:   Fri, 26 Aug 2022 15:33:36 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <mhiramat@...nel.org>, <ast@...nel.org>, <jbacik@...com>,
        <akpm@...ux-foundation.org>
Subject: [PATCH -next 2/3] fail_function: refctor code of checking return value of register_kprobe()

Refactor the error handling of register_kprobe() to improve readability.
No functional change.

Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 kernel/fail_function.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/kernel/fail_function.c b/kernel/fail_function.c
index 03643e33e4c3..893e8f9a9118 100644
--- a/kernel/fail_function.c
+++ b/kernel/fail_function.c
@@ -294,14 +294,13 @@ static ssize_t fei_write(struct file *file, const char __user *buffer,
 	}
 
 	ret = register_kprobe(&attr->kp);
-	if (!ret)
-		fei_debugfs_add_attr(attr);
-	if (ret < 0)
+	if (ret) {
 		fei_attr_remove(attr);
-	else {
-		list_add_tail(&attr->list, &fei_attr_list);
-		ret = count;
+		goto out;
 	}
+	fei_debugfs_add_attr(attr);
+	list_add_tail(&attr->list, &fei_attr_list);
+	ret = count;
 out:
 	mutex_unlock(&fei_lock);
 	kfree(buf);
-- 
2.25.1