linux-kernel - [PATCH v2 -next] usb: misc: use DEFINE

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Message-ID: <20201224132555.31734-1-zhengyongjun3@huawei.com>
Date:   Thu, 24 Dec 2020 21:25:55 +0800
From:   Zheng Yongjun <zhengyongjun3@...wei.com>
To:     <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>,
        Zheng Yongjun <zhengyongjun3@...wei.com>
Subject: [PATCH v2 -next] usb: misc: use DEFINE_MUTEX() for mutex lock

mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().

Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
---
 drivers/usb/misc/ftdi-elan.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index 8a3d9c0c8d8b..bfb538f2cac1 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -61,7 +61,7 @@ extern struct platform_driver u132_platform_driver;
  * ftdi_module_lock exists to protect access to global variables
  *
  */
-static struct mutex ftdi_module_lock;
+static DEFINE_MUTEX(ftdi_module_lock);
 static int ftdi_instances = 0;
 static struct list_head ftdi_static_list;
 /*
@@ -2761,7 +2761,6 @@ static int __init ftdi_elan_init(void)
 {
 	int result;
 	pr_info("driver %s\n", ftdi_elan_driver.name);
-	mutex_init(&ftdi_module_lock);
 	INIT_LIST_HEAD(&ftdi_static_list);
 	result = usb_register(&ftdi_elan_driver);
 	if (result) {
-- 
2.22.0