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path: root/drivers/usb/misc/idmouse.c
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Diffstat (limited to 'drivers/usb/misc/idmouse.c')
-rw-r--r--drivers/usb/misc/idmouse.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
index d8cde101798..d0b16725669 100644
--- a/drivers/usb/misc/idmouse.c
+++ b/drivers/usb/misc/idmouse.c
@@ -25,6 +25,7 @@
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
@@ -121,7 +122,7 @@ static struct usb_driver idmouse_driver = {
};
/* prevent races between open() and disconnect() */
-static DECLARE_MUTEX(disconnect_sem);
+static DEFINE_MUTEX(disconnect_mutex);
static int idmouse_create_image(struct usb_idmouse *dev)
{
@@ -213,18 +214,18 @@ static int idmouse_open(struct inode *inode, struct file *file)
int result = 0;
/* prevent disconnects */
- down(&disconnect_sem);
+ mutex_lock(&disconnect_mutex);
/* get the interface from minor number and driver information */
interface = usb_find_interface (&idmouse_driver, iminor (inode));
if (!interface) {
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
/* get the device information block from the interface */
dev = usb_get_intfdata(interface);
if (!dev) {
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
@@ -258,7 +259,7 @@ error:
up(&dev->sem);
/* unlock the disconnect semaphore */
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return result;
}
@@ -267,12 +268,12 @@ static int idmouse_release(struct inode *inode, struct file *file)
struct usb_idmouse *dev;
/* prevent a race condition with open() */
- down(&disconnect_sem);
+ mutex_lock(&disconnect_mutex);
dev = (struct usb_idmouse *) file->private_data;
if (dev == NULL) {
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
@@ -282,7 +283,7 @@ static int idmouse_release(struct inode *inode, struct file *file)
/* are we really open? */
if (dev->open <= 0) {
up(&dev->sem);
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
@@ -292,12 +293,12 @@ static int idmouse_release(struct inode *inode, struct file *file)
/* the device was unplugged before the file was released */
up(&dev->sem);
idmouse_delete(dev);
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return 0;
}
up(&dev->sem);
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
return 0;
}
@@ -340,10 +341,9 @@ static int idmouse_probe(struct usb_interface *interface,
return -ENODEV;
/* allocate memory for our device state and initialize it */
- dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL)
return -ENOMEM;
- memset(dev, 0x00, sizeof(*dev));
init_MUTEX(&dev->sem);
dev->udev = udev;
@@ -400,7 +400,7 @@ static void idmouse_disconnect(struct usb_interface *interface)
struct usb_idmouse *dev;
/* prevent races with open() */
- down(&disconnect_sem);
+ mutex_lock(&disconnect_mutex);
/* get device structure */
dev = usb_get_intfdata(interface);
@@ -422,7 +422,7 @@ static void idmouse_disconnect(struct usb_interface *interface)
if (!dev->open)
idmouse_delete(dev);
- up(&disconnect_sem);
+ mutex_unlock(&disconnect_mutex);
info("%s disconnected", DRIVER_DESC);
}