#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/usb.h>
#include "usb-serial.h"
#include "pl2303.h"
if (!port)
return -ENODEV;
- if (down_interruptible(&port->sem))
+ if (mutex_lock_interruptible(&port->mutex))
return -ERESTARTSYS;
++port->open_count;
goto bailout_module_put;
}
- up(&port->sem);
+ mutex_unlock(&port->mutex);
return 0;
bailout_module_put:
bailout_kref_put:
kref_put(&serial->kref, destroy_serial);
port->open_count = 0;
- up(&port->sem);
+ mutex_unlock(&port->mutex);
return retval;
}
dbg("%s - port %d", __FUNCTION__, port->number);
- down(&port->sem);
+ mutex_lock(&port->mutex);
- if (port->open_count == 0)
- goto out;
+ if (port->open_count == 0) {
+ mutex_unlock(&port->mutex);
+ return;
+ }
--port->open_count;
if (port->open_count == 0) {
module_put(port->serial->type->driver.owner);
}
+ mutex_unlock(&port->mutex);
kref_put(&port->serial->kref, destroy_serial);
-
-out:
- up(&port->sem);
}
static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
{
struct usb_serial *serial;
- serial = kmalloc (sizeof (*serial), GFP_KERNEL);
+ serial = kzalloc(sizeof(*serial), GFP_KERNEL);
if (!serial) {
dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
return NULL;
}
- memset (serial, 0, sizeof(*serial));
serial->dev = usb_get_dev(dev);
serial->type = driver;
serial->interface = interface;
serial->num_port_pointers = max_endpoints;
dbg("%s - setting up %d port structures for this device", __FUNCTION__, max_endpoints);
for (i = 0; i < max_endpoints; ++i) {
- port = kmalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
+ port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
if (!port)
goto probe_error;
- memset(port, 0x00, sizeof(struct usb_serial_port));
port->number = i + serial->minor;
port->serial = serial;
spin_lock_init(&port->lock);
- sema_init(&port->sem, 1);
+ mutex_init(&port->mutex);
INIT_WORK(&port->work, usb_serial_port_softint, port);
serial->port[i] = port;
}