diff options
| -rw-r--r-- | drivers/usb/serial/ti_usb_3410_5052.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c index 1f0149495fb..995fdf3c489 100644 --- a/drivers/usb/serial/ti_usb_3410_5052.c +++ b/drivers/usb/serial/ti_usb_3410_5052.c @@ -80,6 +80,7 @@ #include <linux/ioctl.h> #include <linux/serial.h> #include <linux/circ_buf.h> +#include <linux/mutex.h> #include <asm/uaccess.h> #include <asm/semaphore.h> #include <linux/usb.h> @@ -139,7 +140,7 @@ struct ti_port { }; struct ti_device { - struct semaphore td_open_close_sem; + struct mutex td_open_close_lock; int td_open_port_count; struct usb_serial *td_serial; int td_is_3410; @@ -424,7 +425,7 @@ static int ti_startup(struct usb_serial *serial) dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); return -ENOMEM; } - sema_init(&tdev->td_open_close_sem, 1); + mutex_init(&tdev->td_open_close_lock); tdev->td_serial = serial; usb_set_serial_data(serial, tdev); @@ -547,7 +548,7 @@ static int ti_open(struct usb_serial_port *port, struct file *file) tdev = tport->tp_tdev; /* only one open on any port on a device at a time */ - if (down_interruptible(&tdev->td_open_close_sem)) + if (mutex_lock_interruptible(&tdev->td_open_close_lock)) return -ERESTARTSYS; if (port->tty) @@ -568,7 +569,7 @@ static int ti_open(struct usb_serial_port *port, struct file *file) if (!urb) { dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__); status = -EINVAL; - goto up_sem; + goto release_lock; } urb->complete = ti_interrupt_callback; urb->context = tdev; @@ -576,7 +577,7 @@ static int ti_open(struct usb_serial_port *port, struct file *file) status = usb_submit_urb(urb, GFP_KERNEL); if (status) { dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status); - goto up_sem; + goto release_lock; } } @@ -656,13 +657,13 @@ static int ti_open(struct usb_serial_port *port, struct file *file) tport->tp_is_open = 1; ++tdev->td_open_port_count; - goto up_sem; + goto release_lock; unlink_int_urb: if (tdev->td_open_port_count == 0) usb_kill_urb(port->serial->port[0]->interrupt_in_urb); -up_sem: - up(&tdev->td_open_close_sem); +release_lock: + mutex_unlock(&tdev->td_open_close_lock); dbg("%s - exit %d", __FUNCTION__, status); return status; } @@ -674,7 +675,7 @@ static void ti_close(struct usb_serial_port *port, struct file *file) struct ti_port *tport; int port_number; int status; - int do_up; + int do_unlock; dbg("%s - port %d", __FUNCTION__, port->number); @@ -699,16 +700,16 @@ static void ti_close(struct usb_serial_port *port, struct file *file) if (status) dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status); - /* if down is interrupted, continue anyway */ - do_up = !down_interruptible(&tdev->td_open_close_sem); + /* if mutex_lock is interrupted, continue anyway */ + do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock); --tport->tp_tdev->td_open_port_count; if (tport->tp_tdev->td_open_port_count <= 0) { /* last port is closed, shut down interrupt urb */ usb_kill_urb(port->serial->port[0]->interrupt_in_urb); tport->tp_tdev->td_open_port_count = 0; } - if (do_up) - up(&tdev->td_open_close_sem); + if (do_unlock) + mutex_unlock(&tdev->td_open_close_lock); dbg("%s - exit", __FUNCTION__); } |