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* [PATCH -next] usb: ftdi-elan: use DEFINE_MUTEX() for mutex lock and LIST_HEAD for list head
@ 2021-04-09  9:51 Ye Bin
  0 siblings, 0 replies; only message in thread
From: Ye Bin @ 2021-04-09  9:51 UTC (permalink / raw)
  To: yebin10, Greg Kroah-Hartman; +Cc: linux-usb, kernel-janitors, Hulk Robot

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

Reported-by: Hulk Robot <>
Signed-off-by: Ye Bin <>
 drivers/usb/misc/ftdi-elan.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index 8a3d9c0c8d8b..6dc17092b095 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -61,9 +61,9 @@ 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;
+static LIST_HEAD(ftdi_static_list);
  * end of the global variables protected by ftdi_module_lock
@@ -2761,8 +2761,6 @@ static int __init ftdi_elan_init(void)
 	int result;
 	pr_info("driver %s\n",;
-	mutex_init(&ftdi_module_lock);
-	INIT_LIST_HEAD(&ftdi_static_list);
 	result = usb_register(&ftdi_elan_driver);
 	if (result) {
 		pr_err("usb_register failed. Error number %d\n", result);

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2021-04-09  9:51 [PATCH -next] usb: ftdi-elan: use DEFINE_MUTEX() for mutex lock and LIST_HEAD for list head Ye Bin

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