Merge tag 'tty-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are four small tty/serial driver fixes for 5.15-rc3. They
  include:

   - remove an export now that no one is using it anymore

   - mvebu-uart tx_empty callback fix

   - 8250_omap bugfix

   - synclink_gt build fix

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: unexport tty_ldisc_release
  tty: synclink_gt: rename a conflicting function name
  serial: mvebu-uart: fix driver's tx_empty callback
  serial: 8250: 8250_omap: Fix RX_LVL register offset

drivers/tty/serial/8250/8250_omap.c

@@ -106,7 +106,7 @@
 #define UART_OMAP_EFR2_TIMEOUT_BEHAVE	BIT(6)
 
 /* RX FIFO occupancy indicator */
-#define UART_OMAP_RX_LVL		0x64
+#define UART_OMAP_RX_LVL		0x19
 
 struct omap8250_priv {
 	int line;

drivers/tty/serial/mvebu-uart.c

@@ -163,7 +163,7 @@ static unsigned int mvebu_uart_tx_empty(struct uart_port *port)
 	st = readl(port->membase + UART_STAT);
 	spin_unlock_irqrestore(&port->lock, flags);
 
-	return (st & STAT_TX_FIFO_EMP) ? TIOCSER_TEMT : 0;
+	return (st & STAT_TX_EMP) ? TIOCSER_TEMT : 0;
 }
 
 static unsigned int mvebu_uart_get_mctrl(struct uart_port *port)

drivers/tty/synclink_gt.c

@@ -438,8 +438,8 @@ static void reset_tbufs(struct slgt_info *info);
 static void tdma_reset(struct slgt_info *info);
 static bool tx_load(struct slgt_info *info, const char *buf, unsigned int count);
 
-static void get_signals(struct slgt_info *info);
-static void set_signals(struct slgt_info *info);
+static void get_gtsignals(struct slgt_info *info);
+static void set_gtsignals(struct slgt_info *info);
 static void set_rate(struct slgt_info *info, u32 data_rate);
 
 static void bh_transmit(struct slgt_info *info);
@@ -720,7 +720,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 	if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
 		info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 		spin_lock_irqsave(&info->lock,flags);
-		set_signals(info);
+		set_gtsignals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
 	}
 
@@ -730,7 +730,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 		if (!C_CRTSCTS(tty) || !tty_throttled(tty))
 			info->signals |= SerialSignal_RTS;
 		spin_lock_irqsave(&info->lock,flags);
-	 	set_signals(info);
+	 	set_gtsignals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
 	}
 
@@ -1181,7 +1181,7 @@ static inline void line_info(struct seq_file *m, struct slgt_info *info)
 
 	/* output current serial signal states */
 	spin_lock_irqsave(&info->lock,flags);
-	get_signals(info);
+	get_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 
 	stat_buf[0] = 0;
@@ -1281,7 +1281,7 @@ static void throttle(struct tty_struct * tty)
 	if (C_CRTSCTS(tty)) {
 		spin_lock_irqsave(&info->lock,flags);
 		info->signals &= ~SerialSignal_RTS;
-		set_signals(info);
+		set_gtsignals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
 	}
 }
@@ -1306,7 +1306,7 @@ static void unthrottle(struct tty_struct * tty)
 	if (C_CRTSCTS(tty)) {
 		spin_lock_irqsave(&info->lock,flags);
 		info->signals |= SerialSignal_RTS;
-		set_signals(info);
+		set_gtsignals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
 	}
 }
@@ -1477,7 +1477,7 @@ static int hdlcdev_open(struct net_device *dev)
 
 	/* inform generic HDLC layer of current DCD status */
 	spin_lock_irqsave(&info->lock, flags);
-	get_signals(info);
+	get_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock, flags);
 	if (info->signals & SerialSignal_DCD)
 		netif_carrier_on(dev);
@@ -2229,7 +2229,7 @@ static void isr_txeom(struct slgt_info *info, unsigned short status)
 		if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done) {
 			info->signals &= ~SerialSignal_RTS;
 			info->drop_rts_on_tx_done = false;
-			set_signals(info);
+			set_gtsignals(info);
 		}
 
 #if SYNCLINK_GENERIC_HDLC
@@ -2394,7 +2394,7 @@ static void shutdown(struct slgt_info *info)
 
  	if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) {
 		info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-		set_signals(info);
+		set_gtsignals(info);
 	}
 
 	flush_cond_wait(&info->gpio_wait_q);
@@ -2422,7 +2422,7 @@ static void program_hw(struct slgt_info *info)
 	else
 		async_mode(info);
 
-	set_signals(info);
+	set_gtsignals(info);
 
 	info->dcd_chkcount = 0;
 	info->cts_chkcount = 0;
@@ -2430,7 +2430,7 @@ static void program_hw(struct slgt_info *info)
 	info->dsr_chkcount = 0;
 
 	slgt_irq_on(info, IRQ_DCD | IRQ_CTS | IRQ_DSR | IRQ_RI);
-	get_signals(info);
+	get_gtsignals(info);
 
 	if (info->netcount ||
 	    (info->port.tty && info->port.tty->termios.c_cflag & CREAD))
@@ -2667,7 +2667,7 @@ static int wait_mgsl_event(struct slgt_info *info, int __user *mask_ptr)
 	spin_lock_irqsave(&info->lock,flags);
 
 	/* return immediately if state matches requested events */
-	get_signals(info);
+	get_gtsignals(info);
 	s = info->signals;
 
 	events = mask &
@@ -3085,7 +3085,7 @@ static int tiocmget(struct tty_struct *tty)
  	unsigned long flags;
 
 	spin_lock_irqsave(&info->lock,flags);
- 	get_signals(info);
+ 	get_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 
 	result = ((info->signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
@@ -3124,7 +3124,7 @@ static int tiocmset(struct tty_struct *tty,
 		info->signals &= ~SerialSignal_DTR;
 
 	spin_lock_irqsave(&info->lock,flags);
-	set_signals(info);
+	set_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 	return 0;
 }
@@ -3135,7 +3135,7 @@ static int carrier_raised(struct tty_port *port)
 	struct slgt_info *info = container_of(port, struct slgt_info, port);
 
 	spin_lock_irqsave(&info->lock,flags);
-	get_signals(info);
+	get_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 	return (info->signals & SerialSignal_DCD) ? 1 : 0;
 }
@@ -3150,7 +3150,7 @@ static void dtr_rts(struct tty_port *port, int on)
 		info->signals |= SerialSignal_RTS | SerialSignal_DTR;
 	else
 		info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-	set_signals(info);
+	set_gtsignals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 }
 
@@ -3948,10 +3948,10 @@ static void tx_start(struct slgt_info *info)
 
 		if (info->params.mode != MGSL_MODE_ASYNC) {
 			if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
-				get_signals(info);
+				get_gtsignals(info);
 				if (!(info->signals & SerialSignal_RTS)) {
 					info->signals |= SerialSignal_RTS;
-					set_signals(info);
+					set_gtsignals(info);
 					info->drop_rts_on_tx_done = true;
 				}
 			}
@@ -4005,7 +4005,7 @@ static void reset_port(struct slgt_info *info)
 	rx_stop(info);
 
 	info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
-	set_signals(info);
+	set_gtsignals(info);
 
 	slgt_irq_off(info, IRQ_ALL | IRQ_MASTER);
 }
@@ -4427,7 +4427,7 @@ static void tx_set_idle(struct slgt_info *info)
 /*
  * get state of V24 status (input) signals
  */
-static void get_signals(struct slgt_info *info)
+static void get_gtsignals(struct slgt_info *info)
 {
 	unsigned short status = rd_reg16(info, SSR);
 
@@ -4489,7 +4489,7 @@ static void msc_set_vcr(struct slgt_info *info)
 /*
  * set state of V24 control (output) signals
  */
-static void set_signals(struct slgt_info *info)
+static void set_gtsignals(struct slgt_info *info)
 {
 	unsigned char val = rd_reg8(info, VCR);
 	if (info->signals & SerialSignal_DTR)

drivers/tty/tty_ldisc.c

@@ -812,7 +812,6 @@ void tty_ldisc_release(struct tty_struct *tty)
 
 	tty_ldisc_debug(tty, "released\n");
 }
-EXPORT_SYMBOL_GPL(tty_ldisc_release);
 
 /**
  *	tty_ldisc_init		-	ldisc setup for new tty