Merge tag 'tty-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here's the big tty/serial driver update for 3.19-rc1.

  There are a number of TTY core changes/fixes in here from Peter Hurley
  that have all been teted in linux-next for a long time now.  There are
  also the normal serial driver updates as well, full details in the
  changelog below"

* tag 'tty-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (219 commits)
  serial: pxa: hold port.lock when reporting modem line changes
  tty-hvsi_lib: Deletion of an unnecessary check before the function call "tty_kref_put"
  tty: Deletion of unnecessary checks before two function calls
  n_tty: Fix read_buf race condition, increment read_head after pushing data
  serial: of-serial: add PM suspend/resume support
  Revert "serial: of-serial: add PM suspend/resume support"
  Revert "serial: of-serial: fix up PM ops on no_console_suspend and port type"
  serial: 8250: don't attempt a trylock if in sysrq
  serial: core: Add big-endian iotype
  serial: samsung: use port->fifosize instead of hardcoded values
  serial: samsung: prefer to use fifosize from driver data
  serial: samsung: fix style problems
  serial: samsung: wait for transfer completion before clock disable
  serial: icom: fix error return code
  serial: tegra: clean up tty-flag assignments
  serial: Fix io address assign flow with Fintek PCI-to-UART Product
  serial: mxs-auart: fix tx_empty against shift register
  serial: mxs-auart: fix gpio change detection on interrupt
  serial: mxs-auart: Fix mxs_auart_set_ldisc()
  serial: 8250_dw: Use 64-bit access for OCTEON.
  ...

1 files changed, 38 insertions, 52 deletions

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index c78f43a481ce..7ed76773c274 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -199,12 +199,14 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port)
 	}
 }
 
-static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port)
+static inline struct s3c24xx_uart_info
+	*s3c24xx_port_to_info(struct uart_port *port)
 {
 	return to_ourport(port)->info;
 }
 
-static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port)
+static inline struct s3c2410_uartcfg
+	*s3c24xx_port_to_cfg(struct uart_port *port)
 {
 	struct s3c24xx_uart_port *ourport;
 
@@ -237,7 +239,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
 	struct uart_port *port = &ourport->port;
 	unsigned int ufcon, ch, flag, ufstat, uerstat;
 	unsigned long flags;
-	int max_count = 64;
+	int max_count = port->fifosize;
 
 	spin_lock_irqsave(&port->lock, flags);
 
@@ -311,14 +313,14 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
 		uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN,
 				 ch, flag);
 
- ignore_char:
+ignore_char:
 		continue;
 	}
 
 	spin_unlock_irqrestore(&port->lock, flags);
 	tty_flip_buffer_push(&port->state->port);
 
- out:
+out:
 	return IRQ_HANDLED;
 }
 
@@ -328,7 +330,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
 	struct uart_port *port = &ourport->port;
 	struct circ_buf *xmit = &port->state->xmit;
 	unsigned long flags;
-	int count = 256;
+	int count = port->fifosize;
 
 	spin_lock_irqsave(&port->lock, flags);
 
@@ -368,7 +370,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
 	if (uart_circ_empty(xmit))
 		s3c24xx_serial_stop_tx(port);
 
- out:
+out:
 	spin_unlock_irqrestore(&port->lock, flags);
 	return IRQ_HANDLED;
 }
@@ -519,7 +521,7 @@ static int s3c24xx_serial_startup(struct uart_port *port)
 
 	return ret;
 
- err:
+err:
 	s3c24xx_serial_shutdown(port);
 	return ret;
 }
@@ -559,11 +561,15 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
 			      unsigned int old)
 {
 	struct s3c24xx_uart_port *ourport = to_ourport(port);
+	int timeout = 10000;
 
 	ourport->pm_level = level;
 
 	switch (level) {
 	case 3:
+		while (--timeout && !s3c24xx_serial_txempty_nofifo(port))
+			udelay(100);
+
 		if (!IS_ERR(ourport->baudclk))
 			clk_disable_unprepare(ourport->baudclk);
 
@@ -841,8 +847,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
 	 */
 	port->read_status_mask = S3C2410_UERSTAT_OVERRUN;
 	if (termios->c_iflag & INPCK)
-		port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY;
-
+		port->read_status_mask |= S3C2410_UERSTAT_FRAME |
+			S3C2410_UERSTAT_PARITY;
 	/*
 	 * Which character status flags should we ignore?
 	 */
@@ -969,10 +975,13 @@ static struct uart_driver s3c24xx_uart_drv = {
 	.minor		= S3C24XX_SERIAL_MINOR,
 };
 
-static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
+#define __PORT_LOCK_UNLOCKED(i) \
+	__SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[i].port.lock)
+static struct s3c24xx_uart_port
+s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
 	[0] = {
 		.port = {
-			.lock		= __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
+			.lock		= __PORT_LOCK_UNLOCKED(0),
 			.iotype		= UPIO_MEM,
 			.uartclk	= 0,
 			.fifosize	= 16,
@@ -983,7 +992,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
 	},
 	[1] = {
 		.port = {
-			.lock		= __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock),
+			.lock		= __PORT_LOCK_UNLOCKED(1),
 			.iotype		= UPIO_MEM,
 			.uartclk	= 0,
 			.fifosize	= 16,
@@ -996,7 +1005,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
 
 	[2] = {
 		.port = {
-			.lock		= __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock),
+			.lock		= __PORT_LOCK_UNLOCKED(2),
 			.iotype		= UPIO_MEM,
 			.uartclk	= 0,
 			.fifosize	= 16,
@@ -1009,7 +1018,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
 #if CONFIG_SERIAL_SAMSUNG_UARTS > 3
 	[3] = {
 		.port = {
-			.lock		= __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock),
+			.lock		= __PORT_LOCK_UNLOCKED(3),
 			.iotype		= UPIO_MEM,
 			.uartclk	= 0,
 			.fifosize	= 16,
@@ -1020,6 +1029,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS
 	}
 #endif
 };
+#undef __PORT_LOCK_UNLOCKED
 
 /* s3c24xx_serial_resetport
  *
@@ -1102,11 +1112,12 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
 		s3c24xx_serial_set_termios(uport, termios, NULL);
 	}
 
- exit:
+exit:
 	return 0;
 }
 
-static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+static inline int
+s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
 {
 	port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition;
 
@@ -1114,19 +1125,22 @@ static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port
 					 CPUFREQ_TRANSITION_NOTIFIER);
 }
 
-static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+static inline void
+s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
 {
 	cpufreq_unregister_notifier(&port->freq_transition,
 				    CPUFREQ_TRANSITION_NOTIFIER);
 }
 
 #else
-static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+static inline int
+s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
 {
 	return 0;
 }
 
-static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+static inline void
+s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
 {
 }
 #endif
@@ -1226,24 +1240,6 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 	return 0;
 }
 
-#ifdef CONFIG_SAMSUNG_CLOCK
-static ssize_t s3c24xx_serial_show_clksrc(struct device *dev,
-					  struct device_attribute *attr,
-					  char *buf)
-{
-	struct uart_port *port = s3c24xx_dev_to_port(dev);
-	struct s3c24xx_uart_port *ourport = to_ourport(port);
-
-	if (IS_ERR(ourport->baudclk))
-		return -EINVAL;
-
-	return snprintf(buf, PAGE_SIZE, "* %s\n",
-			ourport->baudclk->name ?: "(null)");
-}
-
-static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL);
-#endif
-
 /* Device driver serial port probe */
 
 static const struct of_device_id s3c24xx_uart_dt_match[];
@@ -1296,11 +1292,10 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
 		of_property_read_u32(np,
 			"samsung,uart-fifosize", &ourport->port.fifosize);
 
-	if (!ourport->port.fifosize) {
-		ourport->port.fifosize = (ourport->info->fifosize) ?
-			ourport->info->fifosize :
-			ourport->drv_data->fifosize[index];
-	}
+	if (ourport->drv_data->fifosize[index])
+		ourport->port.fifosize = ourport->drv_data->fifosize[index];
+	else if (ourport->info->fifosize)
+		ourport->port.fifosize = ourport->info->fifosize;
 
 	probe_index++;
 
@@ -1329,12 +1324,6 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
 	 */
 	clk_disable_unprepare(ourport->clk);
 
-#ifdef CONFIG_SAMSUNG_CLOCK
-	ret = device_create_file(&pdev->dev, &dev_attr_clock_source);
-	if (ret < 0)
-		dev_err(&pdev->dev, "failed to add clock source attr.\n");
-#endif
-
 	ret = s3c24xx_serial_cpufreq_register(ourport);
 	if (ret < 0)
 		dev_err(&pdev->dev, "failed to add cpufreq notifier\n");
@@ -1348,9 +1337,6 @@ static int s3c24xx_serial_remove(struct platform_device *dev)
 
 	if (port) {
 		s3c24xx_serial_cpufreq_deregister(to_ourport(port));
-#ifdef CONFIG_SAMSUNG_CLOCK
-		device_remove_file(&dev->dev, &dev_attr_clock_source);
-#endif
 		uart_remove_one_port(&s3c24xx_uart_drv, port);
 	}