1 files changed, 15 insertions, 25 deletions

diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 2620bf6fe5e1..0a64bac306ee 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -50,11 +50,10 @@
 
 #define TI_TRANSFER_TIMEOUT     2
 
-#define TI_DEFAULT_LOW_LATENCY  0
 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 
 /* supported setserial flags */
-#define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
+#define TI_SET_SERIAL_FLAGS     0
 
 /* read urb states */
 #define TI_READ_URB_RUNNING     0
@@ -161,7 +160,6 @@ static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
 
 /* module parameters */
 static int debug;
-static int low_latency = TI_DEFAULT_LOW_LATENCY;
 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 static unsigned int vendor_3410_count;
@@ -296,10 +294,6 @@ MODULE_FIRMWARE("mts_edge.fw");
 module_param(debug, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 
-module_param(low_latency, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(low_latency,
-                "TTY low_latency flag, 0=off, 1=on, default is off");
-
 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(closing_wait,
     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
@@ -448,7 +442,6 @@ static int ti_startup(struct usb_serial *serial)
                 spin_lock_init(&tport->tp_lock);
                 tport->tp_uart_base_addr = (i == 0 ?
                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
-                tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
                 tport->tp_closing_wait = closing_wait;
                 init_waitqueue_head(&tport->tp_msr_wait);
                 init_waitqueue_head(&tport->tp_write_wait);
@@ -528,10 +521,6 @@ static int ti_open(struct tty_struct *tty,
         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
                 return -ERESTARTSYS;
 
-        if (tty)
-                tty->low_latency =
-                                (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
         port_number = port->number - port->serial->minor;
 
         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
@@ -1215,20 +1204,22 @@ static void ti_bulk_in_callback(struct urb *urb)
         }
 
         tty = tty_port_tty_get(&port->port);
-        if (tty && urb->actual_length) {
-                usb_serial_debug_data(debug, dev, __func__,
-                        urb->actual_length, urb->transfer_buffer);
-
-                if (!tport->tp_is_open)
-                        dbg("%s - port closed, dropping data", __func__);
-                else
-                        ti_recv(&urb->dev->dev, tty,
+        if (tty) {
+                if (urb->actual_length) {
+                        usb_serial_debug_data(debug, dev, __func__,
+                                urb->actual_length, urb->transfer_buffer);
+
+                        if (!tport->tp_is_open)
+                                dbg("%s - port closed, dropping data",
+                                        __func__);
+                        else
+                                ti_recv(&urb->dev->dev, tty,
                                                 urb->transfer_buffer,
                                                 urb->actual_length);
-
-                spin_lock(&tport->tp_lock);
-                tport->tp_icount.rx += urb->actual_length;
-                spin_unlock(&tport->tp_lock);
+                        spin_lock(&tport->tp_lock);
+                        tport->tp_icount.rx += urb->actual_length;
+                        spin_unlock(&tport->tp_lock);
+                }
                 tty_kref_put(tty);
         }
 
@@ -1452,7 +1443,6 @@ static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
                 return -EFAULT;
 
         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
-        tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
         tport->tp_closing_wait = new_serial.closing_wait;
 
         return 0;