1 files changed, 13 insertions, 87 deletions

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index eadf33d0abba..b67305e3ad57 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -351,6 +351,7 @@ struct uart_port {
 #define UPF_CONS_FLOW           ((__force upf_t) (1 << 23))
 #define UPF_SHARE_IRQ           ((__force upf_t) (1 << 24))
 #define UPF_EXAR_EFR            ((__force upf_t) (1 << 25))
+#define UPF_IIR_ONCE            ((__force upf_t) (1 << 26))
 /* The exact UART type is known and should not be probed.  */
 #define UPF_FIXED_TYPE          ((__force upf_t) (1 << 27))
 #define UPF_BOOT_AUTOCONF       ((__force upf_t) (1 << 28))
@@ -483,10 +484,19 @@ static inline int uart_tx_stopped(struct uart_port *port)
 /*
  * The following are helper functions for the low level drivers.
  */
+
+extern void uart_handle_dcd_change(struct uart_port *uport,
+                unsigned int status);
+extern void uart_handle_cts_change(struct uart_port *uport,
+                unsigned int status);
+
+extern void uart_insert_char(struct uart_port *port, unsigned int status,
+                 unsigned int overrun, unsigned int ch, unsigned int flag);
+
+#ifdef SUPPORT_SYSRQ
 static inline int
 uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
 {
-#ifdef SUPPORT_SYSRQ
         if (port->sysrq) {
                 if (ch && time_before(jiffies, port->sysrq)) {
                         handle_sysrq(ch);
@@ -495,11 +505,10 @@ uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
                 }
                 port->sysrq = 0;
         }
-#endif
         return 0;
 }
-#ifndef SUPPORT_SYSRQ
-#define uart_handle_sysrq_char(port,ch) uart_handle_sysrq_char(port, 0)
+#else
+#define uart_handle_sysrq_char(port,ch) ({ (void)port; 0; })
 #endif
 
 /*
@@ -522,89 +531,6 @@ static inline int uart_handle_break(struct uart_port *port)
         return 0;
 }
 
-/**
- *      uart_handle_dcd_change - handle a change of carrier detect state
- *      @uport: uart_port structure for the open port
- *      @status: new carrier detect status, nonzero if active
- */
-static inline void
-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 pps_event_time ts;
-
-        if (ld && ld->ops->dcd_change)
-                pps_get_ts(&ts);
-
-        uport->icount.dcd++;
-#ifdef CONFIG_HARD_PPS
-        if ((uport->flags & UPF_HARDPPS_CD) && status)
-                hardpps();
-#endif
-
-        if (port->flags & ASYNC_CHECK_CD) {
-                if (status)
-                        wake_up_interruptible(&port->open_wait);
-                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);
-}
-
-/**
- *      uart_handle_cts_change - handle a change of clear-to-send state
- *      @uport: uart_port structure for the open port
- *      @status: new clear to send status, nonzero if active
- */
-static inline void
-uart_handle_cts_change(struct uart_port *uport, unsigned int status)
-{
-        struct tty_port *port = &uport->state->port;
-        struct tty_struct *tty = port->tty;
-
-        uport->icount.cts++;
-
-        if (port->flags & ASYNC_CTS_FLOW) {
-                if (tty->hw_stopped) {
-                        if (status) {
-                                tty->hw_stopped = 0;
-                                uport->ops->start_tx(uport);
-                                uart_write_wakeup(uport);
-                        }
-                } else {
-                        if (!status) {
-                                tty->hw_stopped = 1;
-                                uport->ops->stop_tx(uport);
-                        }
-                }
-        }
-}
-
-#include <linux/tty_flip.h>
-
-static inline void
-uart_insert_char(struct uart_port *port, unsigned int status,
-                 unsigned int overrun, unsigned int ch, unsigned int flag)
-{
-        struct tty_struct *tty = port->state->port.tty;
-
-        if ((status & port->ignore_status_mask & ~overrun) == 0)
-                tty_insert_flip_char(tty, ch, flag);
-
-        /*
-         * Overrun is special.  Since it's reported immediately,
-         * it doesn't affect the current character.
-         */
-        if (status & ~port->ignore_status_mask & overrun)
-                tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-}
-
 /*
  *      UART_ENABLE_MS - determine if port should enable modem status irqs
  */