diff options
| -rw-r--r-- | drivers/usb/serial/oti6858.c | 62 |
1 files changed, 25 insertions, 37 deletions
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c index a65be37bf12..e199b0f4f99 100644 --- a/drivers/usb/serial/oti6858.c +++ b/drivers/usb/serial/oti6858.c @@ -76,8 +76,6 @@ static struct usb_driver oti6858_driver = { static int debug; -#define OTI6858_FIFO_SIZE 1024 - /* requests */ #define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00) #define OTI6858_REQ_T_GET_STATUS 0x01 @@ -180,7 +178,6 @@ static struct usb_serial_driver oti6858_device = { struct oti6858_private { spinlock_t lock; - struct kfifo write_fifo; struct oti6858_control_pkt status; struct { @@ -293,9 +290,12 @@ static void send_data(struct work_struct *work) return; } priv->flags.write_urb_in_use = 1; - - count = kfifo_len(&priv->write_fifo); spin_unlock_irqrestore(&priv->lock, flags); + + spin_lock_irqsave(&port->lock, flags); + count = kfifo_len(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); + if (count > port->bulk_out_size) count = port->bulk_out_size; @@ -329,9 +329,9 @@ static void send_data(struct work_struct *work) return; } - count = kfifo_out_locked(&priv->write_fifo, + count = kfifo_out_locked(&port->write_fifo, port->write_urb->transfer_buffer, - count, &priv->lock); + count, &port->lock); port->write_urb->transfer_buffer_length = count; port->write_urb->dev = port->serial->dev; result = usb_submit_urb(port->write_urb, GFP_NOIO); @@ -354,11 +354,6 @@ static int oti6858_startup(struct usb_serial *serial) priv = kzalloc(sizeof(struct oti6858_private), GFP_KERNEL); if (!priv) break; - if (kfifo_alloc(&priv->write_fifo, OTI6858_FIFO_SIZE, - GFP_KERNEL)) { - kfree(priv); - break; - } spin_lock_init(&priv->lock); init_waitqueue_head(&priv->intr_wait); @@ -375,7 +370,6 @@ static int oti6858_startup(struct usb_serial *serial) for (--i; i >= 0; --i) { priv = usb_get_serial_port_data(serial->port[i]); - kfifo_free(&priv->write_fifo); kfree(priv); usb_set_serial_port_data(serial->port[i], NULL); } @@ -385,14 +379,12 @@ static int oti6858_startup(struct usb_serial *serial) static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count) { - struct oti6858_private *priv = usb_get_serial_port_data(port); - dbg("%s(port = %d, count = %d)", __func__, port->number, count); if (!count) return count; - count = kfifo_in_locked(&priv->write_fifo, buf, count, &priv->lock); + count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); return count; } @@ -400,15 +392,14 @@ static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port, static int oti6858_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; - struct oti6858_private *priv = usb_get_serial_port_data(port); int room = 0; unsigned long flags; dbg("%s(port = %d)", __func__, port->number); - spin_lock_irqsave(&priv->lock, flags); - room = kfifo_avail(&priv->write_fifo); - spin_unlock_irqrestore(&priv->lock, flags); + spin_lock_irqsave(&port->lock, flags); + room = kfifo_avail(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); return room; } @@ -416,15 +407,14 @@ static int oti6858_write_room(struct tty_struct *tty) static int oti6858_chars_in_buffer(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; - struct oti6858_private *priv = usb_get_serial_port_data(port); int chars = 0; unsigned long flags; dbg("%s(port = %d)", __func__, port->number); - spin_lock_irqsave(&priv->lock, flags); - chars = kfifo_len(&priv->write_fifo); - spin_unlock_irqrestore(&priv->lock, flags); + spin_lock_irqsave(&port->lock, flags); + chars = kfifo_len(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); return chars; } @@ -615,10 +605,10 @@ static void oti6858_close(struct usb_serial_port *port) dbg("%s(port = %d)", __func__, port->number); - spin_lock_irqsave(&priv->lock, flags); + spin_lock_irqsave(&port->lock, flags); /* clear out any remaining data in the buffer */ - kfifo_reset_out(&priv->write_fifo); - spin_unlock_irqrestore(&priv->lock, flags); + kfifo_reset_out(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); dbg("%s(): after buf_clear()", __func__); @@ -760,18 +750,12 @@ static int oti6858_ioctl(struct tty_struct *tty, struct file *file, static void oti6858_release(struct usb_serial *serial) { - struct oti6858_private *priv; int i; dbg("%s()", __func__); - for (i = 0; i < serial->num_ports; ++i) { - priv = usb_get_serial_port_data(serial->port[i]); - if (priv) { - kfifo_free(&priv->write_fifo); - kfree(priv); - } - } + for (i = 0; i < serial->num_ports; ++i) + kfree(usb_get_serial_port_data(serial->port[i])); } static void oti6858_read_int_callback(struct urb *urb) @@ -864,10 +848,14 @@ static void oti6858_read_int_callback(struct urb *urb) } } else if (!transient) { unsigned long flags; + int count; + + spin_lock_irqsave(&port->lock, flags); + count = kfifo_len(&port->write_fifo); + spin_unlock_irqrestore(&port->lock, flags); spin_lock_irqsave(&priv->lock, flags); - if (priv->flags.write_urb_in_use == 0 - && kfifo_len(&priv->write_fifo) != 0) { + if (priv->flags.write_urb_in_use == 0 && count != 0) { schedule_delayed_work(&priv->delayed_write_work, 0); resubmit = 0; } |