提交 1b7243e8 编写于 作者: J Jean Delvare 提交者: Jean Delvare

hwmon: (fschmd) Drop useless mutex

As discussed one year ago, the WDIOC_GETSUPPORT ioctl only needs a
mutex because it operates on a static variable. There is no good
reason to keep this variable static, so let's just make it non-static
and drop the now useless mutex altogether.

See the discussion at:
http://marc.info/?l=lm-sensors&m=125563869402323&w=2Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Acked-by: NGuenter Roeck <guenter.roeck@ericsson.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
上级 1ca28218
......@@ -49,7 +49,6 @@
#include <linux/kref.h>
/* Addresses to scan */
static DEFINE_MUTEX(watchdog_mutex);
static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
/* Insmod parameters */
......@@ -850,7 +849,7 @@ static ssize_t watchdog_write(struct file *filp, const char __user *buf,
static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
static struct watchdog_info ident = {
struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
WDIOF_CARDRESET,
.identity = "FSC watchdog"
......@@ -858,7 +857,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
int i, ret = 0;
struct fschmd_data *data = filp->private_data;
mutex_lock(&watchdog_mutex);
switch (cmd) {
case WDIOC_GETSUPPORT:
ident.firmware_version = data->revision;
......@@ -915,7 +913,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
default:
ret = -ENOTTY;
}
mutex_unlock(&watchdog_mutex);
return ret;
}
......
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