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-rw-r--r--include/linux/serial_core.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 8c3dd36fe91a..78dd1e7120a9 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -491,9 +491,13 @@ uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
{
struct uart_state *state = uport->state;
struct tty_port *port = &state->port;
+ struct tty_ldisc *ld = tty_ldisc_ref(port->tty);
+ struct timespec ts;
- uport->icount.dcd++;
+ if (ld && ld->ops->dcd_change)
+ getnstimeofday(&ts);
+ uport->icount.dcd++;
#ifdef CONFIG_HARD_PPS
if ((uport->flags & UPF_HARDPPS_CD) && status)
hardpps();
@@ -505,6 +509,11 @@ uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
else if (port->tty)
tty_hangup(port->tty);
}
+
+ if (ld && ld->ops->dcd_change)
+ ld->ops->dcd_change(port->tty, status, &ts);
+ if (ld)
+ tty_ldisc_deref(ld);
}
/**