From b5784f7d8528926d69c5868f1ddb2af99f85e799 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 18 Apr 2013 17:33:20 +0200
Subject: USB: ti_usb_3410_5052: remove lsr from port data
The line status register is only polled so let's not keep a possibly
outdated value in the port data.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/ti_usb_3410_5052.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
(limited to 'drivers/usb')
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index a49d2a746ccf..3ed8ecafe597 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -67,7 +67,6 @@
struct ti_port {
int tp_is_open;
__u8 tp_msr;
- __u8 tp_lsr;
__u8 tp_shadow_mcr;
__u8 tp_uart_mode; /* 232 or 485 modes */
unsigned int tp_uart_base_addr;
@@ -121,7 +120,7 @@ static void ti_recv(struct usb_serial_port *port, unsigned char *data,
int length);
static void ti_send(struct ti_port *tport);
static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
-static int ti_get_lsr(struct ti_port *tport);
+static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
static int ti_get_serial_info(struct ti_port *tport,
struct serial_struct __user *ret_arg);
static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
@@ -1251,7 +1250,7 @@ static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
}
-static int ti_get_lsr(struct ti_port *tport)
+static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
{
int size, status;
struct ti_device *tdev = tport->tp_tdev;
@@ -1277,7 +1276,7 @@ static int ti_get_lsr(struct ti_port *tport)
dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
- tport->tp_lsr = data->bLSR;
+ *lsr = data->bLSR;
free_data:
kfree(data);
@@ -1370,6 +1369,7 @@ static void ti_drain(struct ti_port *tport, unsigned long timeout)
struct ti_device *tdev = tport->tp_tdev;
struct usb_serial_port *port = tport->tp_port;
wait_queue_t wait;
+ u8 lsr;
spin_lock_irq(&tport->tp_lock);
@@ -1396,11 +1396,11 @@ static void ti_drain(struct ti_port *tport, unsigned long timeout)
/* wait for data to drain from the device */
/* wait for empty tx register, plus 20 ms */
timeout += jiffies;
- tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
+ lsr = 0;
while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
- && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
+ && !(lsr & TI_LSR_TX_EMPTY) && !tdev->td_urb_error
&& !port->serial->disconnected) {
- if (ti_get_lsr(tport))
+ if (ti_get_lsr(tport, &lsr))
break;
mutex_unlock(&port->serial->disc_mutex);
msleep_interruptible(20);
--
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