Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (58 commits)
  tty: split the lock up a bit further
  tty: Move the leader test in disassociate
  tty: Push the bkl down a bit in the hangup code
  tty: Push the lock down further into the ldisc code
  tty: push the BKL down into the handlers a bit
  tty: moxa: split open lock
  tty: moxa: Kill the use of lock_kernel
  tty: moxa: Fix modem op locking
  tty: moxa: Kill off the throttle method
  tty: moxa: Locking clean up
  tty: moxa: rework the locking a bit
  tty: moxa: Use more tty_port ops
  tty: isicom: fix deadlock on shutdown
  tty: mxser: Use the new locking rules to fix setserial properly
  tty: mxser: use the tty_port_open method
  tty: isicom: sort out the board init logic
  tty: isicom: switch to the new tty_port_open helper
  tty: tty_port: Add a kref object to the tty port
  tty: istallion: tty port open/close methods
  tty: stallion: Convert to the tty_port_open/close methods
  ...

5 files changed, 24 insertions, 120 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 5a5385749e1..f72914db2a1 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -214,7 +214,6 @@ unifdef-y += futex.h
 unifdef-y += fs.h
 unifdef-y += gameport.h
 unifdef-y += generic_serial.h
-unifdef-y += hayesesp.h
 unifdef-y += hdlcdrv.h
 unifdef-y += hdlc.h
 unifdef-y += hdreg.h
diff --git a/include/linux/hayesesp.h b/include/linux/hayesesp.h
deleted file mode 100644
index 92b08cfe4a7..00000000000
--- a/include/linux/hayesesp.h
+++ /dev/null
@@ -1,114 +0,0 @@
-#ifndef HAYESESP_H
-#define HAYESESP_H
-
-struct hayes_esp_config {
-        short flow_on;
-        short flow_off;
-        short rx_trigger;
-        short tx_trigger;
-        short pio_threshold;
-        unsigned char rx_timeout;
-        char dma_channel;
-};
-
-#ifdef __KERNEL__
-
-#define ESP_DMA_CHANNEL   0
-#define ESP_RX_TRIGGER    768
-#define ESP_TX_TRIGGER    768
-#define ESP_FLOW_OFF      1016
-#define ESP_FLOW_ON       944
-#define ESP_RX_TMOUT      128
-#define ESP_PIO_THRESHOLD 32
-
-#define ESP_IN_MAJOR    57      /* major dev # for dial in */
-#define ESP_OUT_MAJOR   58      /* major dev # for dial out */
-#define ESPC_SCALE      3
-#define UART_ESI_BASE   0x00
-#define UART_ESI_SID    0x01
-#define UART_ESI_RX     0x02
-#define UART_ESI_TX     0x02
-#define UART_ESI_CMD1   0x04
-#define UART_ESI_CMD2   0x05
-#define UART_ESI_STAT1  0x04
-#define UART_ESI_STAT2  0x05
-#define UART_ESI_RWS    0x07
-
-#define UART_IER_DMA_TMOUT      0x80
-#define UART_IER_DMA_TC         0x08
-
-#define ESI_SET_IRQ             0x04
-#define ESI_SET_DMA_TMOUT       0x05
-#define ESI_SET_SRV_MASK        0x06
-#define ESI_SET_ERR_MASK        0x07
-#define ESI_SET_FLOW_CNTL       0x08
-#define ESI_SET_FLOW_CHARS      0x09
-#define ESI_SET_FLOW_LVL        0x0a
-#define ESI_SET_TRIGGER         0x0b
-#define ESI_SET_RX_TIMEOUT      0x0c
-#define ESI_SET_FLOW_TMOUT      0x0d
-#define ESI_WRITE_UART          0x0e
-#define ESI_READ_UART           0x0f
-#define ESI_SET_MODE            0x10
-#define ESI_GET_ERR_STAT        0x12
-#define ESI_GET_UART_STAT       0x13
-#define ESI_GET_RX_AVAIL        0x14
-#define ESI_GET_TX_AVAIL        0x15
-#define ESI_START_DMA_RX        0x16
-#define ESI_START_DMA_TX        0x17
-#define ESI_ISSUE_BREAK         0x1a
-#define ESI_FLUSH_RX            0x1b
-#define ESI_FLUSH_TX            0x1c
-#define ESI_SET_BAUD            0x1d
-#define ESI_SET_ENH_IRQ         0x1f
-#define ESI_SET_REINTR          0x20
-#define ESI_SET_PRESCALAR       0x23
-#define ESI_NO_COMMAND          0xff
-
-#define ESP_STAT_RX_TIMEOUT     0x01
-#define ESP_STAT_DMA_RX         0x02
-#define ESP_STAT_DMA_TX         0x04
-#define ESP_STAT_NEVER_DMA      0x08
-#define ESP_STAT_USE_PIO        0x10
-
-#define ESP_MAGIC               0x53ee
-#define ESP_XMIT_SIZE           4096
-
-struct esp_struct {
-        int                     magic;
-        struct tty_port         port;
-        spinlock_t              lock;
-        int                     io_port;
-        int                     irq;
-        int                     read_status_mask;
-        int                     ignore_status_mask;
-        int                     timeout;
-        int                     stat_flags;
-        int                     custom_divisor;
-        int                     close_delay;
-        unsigned short          closing_wait;
-        unsigned short          closing_wait2;
-        int                     IER;    /* Interrupt Enable Register */
-        int                     MCR;    /* Modem control register */
-        unsigned long           last_active;
-        int                     line;
-        unsigned char           *xmit_buf;
-        int                     xmit_head;
-        int                     xmit_tail;
-        int                     xmit_cnt;
-        wait_queue_head_t       break_wait;
-        struct async_icount     icount; /* kernel counters for the 4 input interrupts */
-        struct hayes_esp_config config; /* port configuration */
-        struct esp_struct       *next_port; /* For the linked list */
-};
-
-struct esp_pio_buffer {
-        unsigned char data[1024];
-        struct esp_pio_buffer *next;
-};
-
-#endif /* __KERNEL__ */
-
-
-#endif /* ESP_H */
-
diff --git a/include/linux/isicom.h b/include/linux/isicom.h
index bbd42197298..b92e0565063 100644
--- a/include/linux/isicom.h
+++ b/include/linux/isicom.h
@@ -67,6 +67,7 @@
 
 #define         FIRMWARE_LOADED         0x0001
 #define         BOARD_ACTIVE            0x0002
+#define         BOARD_INIT              0x0004
 
         /* isi_port status bitmap  */
 
diff --git a/include/linux/tty.h b/include/linux/tty.h
index f0f43d08d8b..405a9035fe4 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -190,9 +190,17 @@ struct tty_port_operations {
         /* Control the DTR line */
         void (*dtr_rts)(struct tty_port *port, int raise);
         /* Called when the last close completes or a hangup finishes
-           IFF the port was initialized. Do not use to free resources */
+           IFF the port was initialized. Do not use to free resources. Called
+           under the port mutex to serialize against activate/shutdowns */
         void (*shutdown)(struct tty_port *port);
         void (*drop)(struct tty_port *port);
+        /* Called under the port mutex from tty_port_open, serialized using
+           the port mutex */
+        /* FIXME: long term getting the tty argument *out* of this would be
+           good for consoles */
+        int (*activate)(struct tty_port *port, struct tty_struct *tty);
+        /* Called on the final put of a port */
+        void (*destruct)(struct tty_port *port);
 };
         
 struct tty_port {
@@ -206,12 +214,14 @@ struct tty_port {
         wait_queue_head_t       delta_msr_wait; /* Modem status change */
         unsigned long           flags;          /* TTY flags ASY_*/
         struct mutex            mutex;          /* Locking */
+        struct mutex            buf_mutex;      /* Buffer alloc lock */
         unsigned char           *xmit_buf;      /* Optional buffer */
         unsigned int            close_delay;    /* Close port delay */
         unsigned int            closing_wait;   /* Delay for output */
         int                     drain_delay;    /* Set to zero if no pure time
                                                    based drain is needed else
                                                    set to size of fifo */
+        struct kref             kref;           /* Ref counter */
 };
 
 /*
@@ -439,7 +449,7 @@ extern void initialize_tty_struct(struct tty_struct *tty,
                 struct tty_driver *driver, int idx);
 extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
                                                                 int first_ok);
-extern void tty_release_dev(struct file *filp);
+extern int tty_release(struct inode *inode, struct file *filp);
 extern int tty_init_termios(struct tty_struct *tty);
 
 extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
@@ -454,6 +464,15 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 extern void tty_port_init(struct tty_port *port);
 extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
+extern void tty_port_put(struct tty_port *port);
+
+extern inline struct tty_port *tty_port_get(struct tty_port *port)
+{
+        if (port)
+                kref_get(&port->kref);
+        return port;
+}
+
 extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
 extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
 extern int tty_port_carrier_raised(struct tty_port *port);
@@ -467,6 +486,8 @@ extern int tty_port_close_start(struct tty_port *port,
 extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
 extern void tty_port_close(struct tty_port *port,
                                 struct tty_struct *tty, struct file *filp);
+extern int tty_port_open(struct tty_port *port,
+                                struct tty_struct *tty, struct file *filp);
 extern inline int tty_port_users(struct tty_port *port)
 {
         return port->count + port->blocked_open;
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ce911ebf91e..acf6e457c04 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -39,8 +39,6 @@ enum port_dev_state {
  * @serial: pointer back to the struct usb_serial owner of this port.
  * @port: pointer to the corresponding tty_port for this port.
  * @lock: spinlock to grab when updating portions of this structure.
- * @mutex: mutex used to synchronize serial_open() and serial_close()
- *      access for this port.
  * @number: the number of the port (the minor number).
  * @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
  * @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
@@ -77,7 +75,6 @@ struct usb_serial_port {
         struct usb_serial       *serial;
         struct tty_port         port;
         spinlock_t              lock;
-        struct mutex            mutex;
         unsigned char           number;
 
         unsigned char           *interrupt_in_buffer;