1 files changed, 6 insertions, 30 deletions

diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index 5b07c0c3a10c..7264d4d26717 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -952,19 +952,6 @@ static const struct control_pins e100_modem_pins[NR_PORTS] =
 /* Input */
 #define E100_DSR_GET(info) ((*e100_modem_pins[(info)->line].dsr_port) & e100_modem_pins[(info)->line].dsr_mask)
 
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write.  We need to
- * lock it in case the memcpy_fromfs blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DEFINE_MUTEX(tmp_buf_mutex);
-
 /* Calculate the chartime depending on baudrate, numbor of bits etc. */
 static void update_char_time(struct e100_serial * info)
 {
@@ -3150,7 +3137,7 @@ static int rs_raw_write(struct tty_struct *tty,
 
 	/* first some sanity checks */
 
-	if (!tty || !info->xmit.buf || !tmp_buf)
+	if (!tty || !info->xmit.buf)
 		return 0;
 
 #ifdef SERIAL_DEBUG_DATA
@@ -3989,7 +3976,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
 	 */
 	if (tty_hung_up_p(filp) ||
 	    (info->flags & ASYNC_CLOSING)) {
-		wait_event_interruptible_tty(info->close_wait,
+		wait_event_interruptible_tty(tty, info->close_wait,
 			!(info->flags & ASYNC_CLOSING));
 #ifdef SERIAL_DO_RESTART
 		if (info->flags & ASYNC_HUP_NOTIFY)
@@ -4065,9 +4052,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
 		printk("block_til_ready blocking: ttyS%d, count = %d\n",
 		       info->line, info->count);
 #endif
-		tty_unlock();
+		tty_unlock(tty);
 		schedule();
-		tty_lock();
+		tty_lock(tty);
 	}
 	set_current_state(TASK_RUNNING);
 	remove_wait_queue(&info->open_wait, &wait);
@@ -4106,7 +4093,6 @@ rs_open(struct tty_struct *tty, struct file * filp)
 {
 	struct e100_serial	*info;
 	int 			retval;
-	unsigned long           page;
 	int                     allocated_resources = 0;
 
 	info = rs_table + tty->index;
@@ -4124,23 +4110,12 @@ rs_open(struct tty_struct *tty, struct file * filp)
 
 	tty->low_latency = !!(info->flags & ASYNC_LOW_LATENCY);
 
-	if (!tmp_buf) {
-		page = get_zeroed_page(GFP_KERNEL);
-		if (!page) {
-			return -ENOMEM;
-		}
-		if (tmp_buf)
-			free_page(page);
-		else
-			tmp_buf = (unsigned char *) page;
-	}
-
 	/*
 	 * If the port is in the middle of closing, bail out now
 	 */
 	if (tty_hung_up_p(filp) ||
 	    (info->flags & ASYNC_CLOSING)) {
-		wait_event_interruptible_tty(info->close_wait,
+		wait_event_interruptible_tty(tty, info->close_wait,
 			!(info->flags & ASYNC_CLOSING));
 #ifdef SERIAL_DO_RESTART
 		return ((info->flags & ASYNC_HUP_NOTIFY) ?
@@ -4487,6 +4462,7 @@ static int __init rs_init(void)
 				info->enabled = 0;
 			}
 		}
+		tty_port_init(&info->port);
 		info->uses_dma_in = 0;
 		info->uses_dma_out = 0;
 		info->line = i;