Merge tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial patches from Greg Kroah-Hartman:
 "Here's the big tty/serial driver patches for 3.9-rc1.

  More tty port rework and fixes from Jiri here, as well as lots of
  individual serial driver updates and fixes.

  All of these have been in the linux-next tree for a while."

* tag 'tty-3.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits)
  tty: mxser: improve error handling in mxser_probe() and mxser_module_init()
  serial: imx: fix uninitialized variable warning
  serial: tegra: assume CONFIG_OF
  TTY: do not update atime/mtime on read/write
  lguest: select CONFIG_TTY to build properly.
  ARM defconfigs: add missing inclusions of linux/platform_device.h
  fb/exynos: include platform_device.h
  ARM: sa1100/assabet: include platform_device.h directly
  serial: imx: Fix recursive locking bug
  pps: Fix build breakage from decoupling pps from tty
  tty: Remove ancient hardpps()
  pps: Additional cleanups in uart_handle_dcd_change
  pps: Move timestamp read into PPS code proper
  pps: Don't crash the machine when exiting will do
  pps: Fix a use-after free bug when unregistering a source.
  pps: Use pps_lookup_dev to reduce ldisc coupling
  pps: Add pps_lookup_dev() function
  tty: serial: uartlite: Support uartlite on big and little endian systems
  tty: serial: uartlite: Fix sparse and checkpatch warnings
  serial/arc-uart: Miscll DT related updates (Grant's review comments)
  ...

Fix up trivial conflicts, mostly just due to the TTY config option
clashing with the EXPERIMENTAL removal.

3 files changed, 37 insertions, 36 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 72bedad6bf8..3bb6fa3930b 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -53,7 +53,7 @@ source "drivers/tty/serial/Kconfig"
 
 config TTY_PRINTK
 	bool "TTY driver to output user messages via printk"
-	depends on EXPERT
+	depends on EXPERT && TTY
 	default n
 	---help---
 	  If you say Y here, the support for writing user messages (i.e.
@@ -159,7 +159,7 @@ source "drivers/tty/hvc/Kconfig"
 
 config VIRTIO_CONSOLE
 	tristate "Virtio console"
-	depends on VIRTIO
+	depends on VIRTIO && TTY
 	select HVC_DRIVER
 	help
 	  Virtio console for use with lguest and other hypervisors.
@@ -392,6 +392,7 @@ config XILINX_HWICAP
 
 config R3964
 	tristate "Siemens R3964 line discipline"
+	depends on TTY
 	---help---
 	  This driver allows synchronous communication with devices using the
 	  Siemens R3964 packet protocol. Unless you are dealing with special
@@ -439,7 +440,7 @@ source "drivers/char/pcmcia/Kconfig"
 
 config MWAVE
 	tristate "ACP Modem (Mwave) support"
-	depends on X86
+	depends on X86 && TTY
 	select SERIAL_8250
 	---help---
 	  The ACP modem (Mwave) for Linux is a WinModem. It is composed of a
diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
index 6614416a862..2a166d56738 100644
--- a/drivers/char/pcmcia/Kconfig
+++ b/drivers/char/pcmcia/Kconfig
@@ -7,7 +7,7 @@ menu "PCMCIA character devices"
 
 config SYNCLINK_CS
 	tristate "SyncLink PC Card support"
-	depends on PCMCIA
+	depends on PCMCIA && TTY
 	help
 	  Enable support for the SyncLink PC Card serial adapter, running
 	  asynchronous and HDLC communications up to 512Kbps. The port is
@@ -45,7 +45,7 @@ config CARDMAN_4040
 
 config IPWIRELESS
 	tristate "IPWireless 3G UMTS PCMCIA card support"
-	depends on PCMCIA && NETDEVICES
+	depends on PCMCIA && NETDEVICES && TTY
 	select PPP
 	help
 	  This is a driver for 3G UMTS PCMCIA card from IPWireless company. In
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index b66eaa04f8c..d0c9852ab87 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -210,7 +210,7 @@ typedef struct _mgslpc_info {
 	char testing_irq;
 	unsigned int init_error;	/* startup error (DIAGS)	*/
 
-	char flag_buf[MAX_ASYNC_BUFFER_SIZE];
+	char *flag_buf;
 	bool drop_rts_on_tx_done;
 
 	struct	_input_signal_events	input_signal_events;
@@ -765,9 +765,6 @@ static void bh_handler(struct work_struct *work)
 	struct tty_struct *tty;
 	int action;
 
-	if (!info)
-		return;
-
 	if (debug_level >= DEBUG_LEVEL_BH)
 		printk( "%s(%d):bh_handler(%s) entry\n",
 			__FILE__,__LINE__,info->device_name);
@@ -886,21 +883,14 @@ static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
 	issue_command(info, CHA, CMD_RXFIFO);
 }
 
-static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
+static void rx_ready_async(MGSLPC_INFO *info, int tcd)
 {
+	struct tty_port *port = &info->port;
 	unsigned char data, status, flag;
 	int fifo_count;
 	int work = 0;
  	struct mgsl_icount *icount = &info->icount;
 
-	if (!tty) {
-		/* tty is not available anymore */
-		issue_command(info, CHA, CMD_RXRESET);
-		if (debug_level >= DEBUG_LEVEL_ISR)
-			printk("%s(%d):rx_ready_async(tty=NULL)\n",__FILE__,__LINE__);
-		return;
-	}
-
 	if (tcd) {
 		/* early termination, get FIFO count from RBCL register */
 		fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
@@ -913,7 +903,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
 	} else
 		fifo_count = 32;
 
-	tty_buffer_request_room(tty, fifo_count);
+	tty_buffer_request_room(port, fifo_count);
 	/* Flush received async data to receive data buffer. */
 	while (fifo_count) {
 		data   = read_reg(info, CHA + RXFIFO);
@@ -944,7 +934,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
 			else if (status & BIT6)
 				flag = TTY_FRAME;
 		}
-		work += tty_insert_flip_char(tty, data, flag);
+		work += tty_insert_flip_char(port, data, flag);
 	}
 	issue_command(info, CHA, CMD_RXFIFO);
 
@@ -957,7 +947,7 @@ static void rx_ready_async(MGSLPC_INFO *info, int tcd, struct tty_struct *tty)
 	}
 
 	if (work)
-		tty_flip_buffer_push(tty);
+		tty_flip_buffer_push(port);
 }
 
 
@@ -1217,7 +1207,7 @@ static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
 				if (info->params.mode == MGSL_MODE_HDLC)
 					rx_ready_hdlc(info, isr & IRQ_RXEOM);
 				else
-					rx_ready_async(info, isr & IRQ_RXEOM, tty);
+					rx_ready_async(info, isr & IRQ_RXEOM);
 			}
 
 			/* transmit IRQs */
@@ -1353,7 +1343,7 @@ static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
 	reset_device(info);
 
  	if (!tty || tty->termios.c_cflag & HUPCL) {
- 		info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
+		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 		set_signals(info);
 	}
 
@@ -1415,12 +1405,12 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
 
 	cflag = tty->termios.c_cflag;
 
-	/* if B0 rate (hangup) specified then negate DTR and RTS */
-	/* otherwise assert DTR and RTS */
+	/* if B0 rate (hangup) specified then negate RTS and DTR */
+	/* otherwise assert RTS and DTR */
  	if (cflag & CBAUD)
-		info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+		info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
 	else
-		info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 
 	/* byte size and parity */
 
@@ -2311,7 +2301,7 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term
 	/* Handle transition to B0 status */
 	if (old_termios->c_cflag & CBAUD &&
 	    !(tty->termios.c_cflag & CBAUD)) {
-		info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
+		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 		spin_lock_irqsave(&info->lock,flags);
 	 	set_signals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
@@ -2474,9 +2464,9 @@ static void dtr_rts(struct tty_port *port, int onoff)
 
 	spin_lock_irqsave(&info->lock,flags);
 	if (onoff)
-		info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+		info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
 	else
-		info->serial_signals &= ~SerialSignal_RTS + SerialSignal_DTR;
+		info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
 	set_signals(info);
 	spin_unlock_irqrestore(&info->lock,flags);
 }
@@ -2521,7 +2511,7 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 		goto cleanup;
 	}
 
-	tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
 	spin_lock_irqsave(&info->netlock, flags);
 	if (info->netcount) {
@@ -2674,6 +2664,14 @@ static int rx_alloc_buffers(MGSLPC_INFO *info)
 	if (info->rx_buf == NULL)
 		return -ENOMEM;
 
+	/* unused flag buffer to satisfy receive_buf calling interface */
+	info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
+	if (!info->flag_buf) {
+		kfree(info->rx_buf);
+		info->rx_buf = NULL;
+		return -ENOMEM;
+	}
+	
 	rx_reset_buffers(info);
 	return 0;
 }
@@ -2682,6 +2680,8 @@ static void rx_free_buffers(MGSLPC_INFO *info)
 {
 	kfree(info->rx_buf);
 	info->rx_buf = NULL;
+	kfree(info->flag_buf);
+	info->flag_buf = NULL;
 }
 
 static int claim_resources(MGSLPC_INFO *info)
@@ -3575,8 +3575,8 @@ static void get_signals(MGSLPC_INFO *info)
 {
 	unsigned char status = 0;
 
-	/* preserve DTR and RTS */
-	info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
+	/* preserve RTS and DTR */
+	info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
 
 	if (read_reg(info, CHB + VSTR) & BIT7)
 		info->serial_signals |= SerialSignal_DCD;
@@ -3590,7 +3590,7 @@ static void get_signals(MGSLPC_INFO *info)
 		info->serial_signals |= SerialSignal_DSR;
 }
 
-/* Set the state of DTR and RTS based on contents of
+/* Set the state of RTS and DTR based on contents of
  * serial_signals member of device extension.
  */
 static void set_signals(MGSLPC_INFO *info)
@@ -4009,8 +4009,8 @@ static int hdlcdev_open(struct net_device *dev)
 		spin_unlock_irqrestore(&info->netlock, flags);
 		return rc;
 	}
-	/* assert DTR and RTS, apply hardware settings */
-	info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+	/* assert RTS and DTR, apply hardware settings */
+	info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
 	mgslpc_program_hw(info, tty);
 	tty_kref_put(tty);