serial: move delta_msr_wait into the tty_port

This is used by various drivers not just serial and can be extracted
as commonality

Signed-off-by: Alan Cox <alan@linux.intel.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/char/esp.c b/drivers/char/esp.c
index a5c59fc2b0ff..b19d43cd9542 100644
--- a/drivers/char/esp.c
+++ b/drivers/char/esp.c
@@ -572,7 +572,7 @@ static void check_modem_status(struct esp_struct *info)
                         info->icount.dcd++;
                 if (status & UART_MSR_DCTS)
                         info->icount.cts++;
-                wake_up_interruptible(&info->delta_msr_wait);
+                wake_up_interruptible(&info->port.delta_msr_wait);
         }
 
         if ((info->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
@@ -927,7 +927,7 @@ static void shutdown(struct esp_struct *info)
          * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
          * here so the queue might never be waken up
          */
-        wake_up_interruptible(&info->delta_msr_wait);
+        wake_up_interruptible(&info->port.delta_msr_wait);
         wake_up_interruptible(&info->break_wait);
 
         /* stop a DMA transfer on the port being closed */
@@ -1800,7 +1800,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file *file,
                 spin_unlock_irqrestore(&info->lock, flags);
                 while (1) {
                         /* FIXME: convert to new style wakeup */
-                        interruptible_sleep_on(&info->delta_msr_wait);
+                        interruptible_sleep_on(&info->port.delta_msr_wait);
                         /* see if a signal did it */
                         if (signal_pending(current))
                                 return -ERESTARTSYS;
@@ -2452,7 +2452,6 @@ static int __init espserial_init(void)
                 info->config.flow_off = flow_off;
                 info->config.pio_threshold = pio_threshold;
                 info->next_port = ports;
-                init_waitqueue_head(&info->delta_msr_wait);
                 init_waitqueue_head(&info->break_wait);
                 ports = info;
                 printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ",