serial: move the flags into the tty_port field

Fortunately the serial layer was designed to use the same flag values but
with different names. It has its own SUSPENDED flag which is a free slot in
the ASYNC flags so we allocate it in the ASYNC flags instead.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 98 insertions, 105 deletions

diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 4af3364dd811..744dec9301fb 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -29,10 +29,10 @@
 #include <linux/console.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#include <linux/serial_core.h>
 #include <linux/smp_lock.h>
 #include <linux/device.h>
 #include <linux/serial.h> /* for serial_state and serial_icounter_struct */
+#include <linux/serial_core.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
 
@@ -146,7 +146,7 @@ static int uart_startup(struct uart_state *state, int init_hw)
         unsigned long page;
         int retval = 0;
 
-        if (state->flags & UIF_INITIALIZED)
+        if (port->flags & ASYNC_INITIALIZED)
                 return 0;
 
         /*
@@ -189,14 +189,14 @@ static int uart_startup(struct uart_state *state, int init_hw)
                                 uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
                 }
 
-                if (state->flags & UIF_CTS_FLOW) {
+                if (port->flags & ASYNC_CTS_FLOW) {
                         spin_lock_irq(&uport->lock);
                         if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS))
                                 port->tty->hw_stopped = 1;
                         spin_unlock_irq(&uport->lock);
                 }
 
-                state->flags |= UIF_INITIALIZED;
+                set_bit(ASYNCB_INITIALIZED, &port->flags);
 
                 clear_bit(TTY_IO_ERROR, &port->tty->flags);
         }
@@ -214,7 +214,7 @@ static int uart_startup(struct uart_state *state, int init_hw)
  */
 static void uart_shutdown(struct uart_state *state)
 {
-        struct uart_port *port = state->uart_port;
+        struct uart_port *uport = state->uart_port;
         struct tty_struct *tty = state->port.tty;
 
         /*
@@ -223,14 +223,12 @@ static void uart_shutdown(struct uart_state *state)
         if (tty)
                 set_bit(TTY_IO_ERROR, &tty->flags);
 
-        if (state->flags & UIF_INITIALIZED) {
-                state->flags &= ~UIF_INITIALIZED;
-
+        if (test_and_clear_bit(ASYNCB_INITIALIZED, &state->port.flags)) {
                 /*
                  * Turn off DTR and RTS early.
                  */
                 if (!tty || (tty->termios->c_cflag & HUPCL))
-                        uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+                        uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
 
                 /*
                  * clear delta_msr_wait queue to avoid mem leaks: we may free
@@ -244,12 +242,12 @@ static void uart_shutdown(struct uart_state *state)
                 /*
                  * Free the IRQ and disable the port.
                  */
-                port->ops->shutdown(port);
+                uport->ops->shutdown(uport);
 
                 /*
                  * Ensure that the IRQ handler isn't running on another CPU.
                  */
-                synchronize_irq(port->irq);
+                synchronize_irq(uport->irq);
         }
 
         /*
@@ -429,15 +427,16 @@ EXPORT_SYMBOL(uart_get_divisor);
 static void
 uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
 {
-        struct tty_struct *tty = state->port.tty;
-        struct uart_port *port = state->uart_port;
+        struct tty_port *port = &state->port;
+        struct tty_struct *tty = port->tty;
+        struct uart_port *uport = state->uart_port;
         struct ktermios *termios;
 
         /*
          * If we have no tty, termios, or the port does not exist,
          * then we can't set the parameters for this port.
          */
-        if (!tty || !tty->termios || port->type == PORT_UNKNOWN)
+        if (!tty || !tty->termios || uport->type == PORT_UNKNOWN)
                 return;
 
         termios = tty->termios;
@@ -446,16 +445,16 @@ uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
          * Set flags based on termios cflag
          */
         if (termios->c_cflag & CRTSCTS)
-                state->flags |= UIF_CTS_FLOW;
+                set_bit(ASYNCB_CTS_FLOW, &port->flags);
         else
-                state->flags &= ~UIF_CTS_FLOW;
+                clear_bit(ASYNCB_CTS_FLOW, &port->flags);
 
         if (termios->c_cflag & CLOCAL)
-                state->flags &= ~UIF_CHECK_CD;
+                clear_bit(ASYNCB_CHECK_CD, &port->flags);
         else
-                state->flags |= UIF_CHECK_CD;
+                set_bit(ASYNCB_CHECK_CD, &port->flags);
 
-        port->ops->set_termios(port, termios, old_termios);
+        uport->ops->set_termios(uport, termios, old_termios);
 }
 
 static inline int
@@ -848,7 +847,7 @@ static int uart_set_info(struct uart_state *state,
         retval = 0;
         if (uport->type == PORT_UNKNOWN)
                 goto exit;
-        if (state->flags & UIF_INITIALIZED) {
+        if (port->flags & ASYNC_INITIALIZED) {
                 if (((old_flags ^ uport->flags) & UPF_SPD_MASK) ||
                     old_custom_divisor != uport->custom_divisor) {
                         /*
@@ -1306,7 +1305,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
          * At this point, we stop accepting input.  To do this, we
          * disable the receive line status interrupts.
          */
-        if (state->flags & UIF_INITIALIZED) {
+        if (port->flags & ASYNC_INITIALIZED) {
                 unsigned long flags;
                 spin_lock_irqsave(&port->lock, flags);
                 uport->ops->stop_rx(uport);
@@ -1337,7 +1336,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
         /*
          * Wake up anyone trying to open this port.
          */
-        state->flags &= ~UIF_NORMAL_ACTIVE;
+        clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
         wake_up_interruptible(&port->open_wait);
 
 done:
@@ -1418,11 +1417,11 @@ static void uart_hangup(struct tty_struct *tty)
         pr_debug("uart_hangup(%d)\n", state->uart_port->line);
 
         mutex_lock(&state->mutex);
-        if (state->flags & UIF_NORMAL_ACTIVE) {
+        if (port->flags & ASYNC_NORMAL_ACTIVE) {
                 uart_flush_buffer(tty);
                 uart_shutdown(state);
                 port->count = 0;
-                state->flags &= ~UIF_NORMAL_ACTIVE;
+                clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
                 port->tty = NULL;
                 wake_up_interruptible(&port->open_wait);
                 wake_up_interruptible(&state->delta_msr_wait);
@@ -1493,7 +1492,7 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
                 /*
                  * If the port has been closed, tell userspace/restart open.
                  */
-                if (!(state->flags & UIF_INITIALIZED))
+                if (!(port->flags & ASYNC_INITIALIZED))
                         break;
 
                 /*
@@ -1662,8 +1661,8 @@ static int uart_open(struct tty_struct *tty, struct file *filp)
         /*
          * If this is the first open to succeed, adjust things to suit.
          */
-        if (retval == 0 && !(state->flags & UIF_NORMAL_ACTIVE)) {
-                state->flags |= UIF_NORMAL_ACTIVE;
+        if (retval == 0 && !(port->flags & ASYNC_NORMAL_ACTIVE)) {
+                set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
 
                 uart_update_termios(state);
         }
@@ -1985,63 +1984,64 @@ static int serial_match_port(struct device *dev, void *data)
         return dev->devt == devt; /* Actually, only one tty per port */
 }
 
-int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
+int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport)
 {
-        struct uart_state *state = drv->state + port->line;
+        struct uart_state *state = drv->state + uport->line;
+        struct tty_port *port = &state->port;
         struct device *tty_dev;
-        struct uart_match match = {port, drv};
+        struct uart_match match = {uport, drv};
 
         mutex_lock(&state->mutex);
 
-        if (!console_suspend_enabled && uart_console(port)) {
+        if (!console_suspend_enabled && uart_console(uport)) {
                 /* we're going to avoid suspending serial console */
                 mutex_unlock(&state->mutex);
                 return 0;
         }
 
-        tty_dev = device_find_child(port->dev, &match, serial_match_port);
+        tty_dev = device_find_child(uport->dev, &match, serial_match_port);
         if (device_may_wakeup(tty_dev)) {
-                enable_irq_wake(port->irq);
+                enable_irq_wake(uport->irq);
                 put_device(tty_dev);
                 mutex_unlock(&state->mutex);
                 return 0;
         }
-        port->suspended = 1;
+        uport->suspended = 1;
 
-        if (state->flags & UIF_INITIALIZED) {
-                const struct uart_ops *ops = port->ops;
+        if (port->flags & ASYNC_INITIALIZED) {
+                const struct uart_ops *ops = uport->ops;
                 int tries;
 
-                state->flags = (state->flags & ~UIF_INITIALIZED)
-                                     | UIF_SUSPENDED;
+                set_bit(ASYNCB_SUSPENDED, &port->flags);
+                clear_bit(ASYNCB_INITIALIZED, &port->flags);
 
-                spin_lock_irq(&port->lock);
-                ops->stop_tx(port);
-                ops->set_mctrl(port, 0);
-                ops->stop_rx(port);
-                spin_unlock_irq(&port->lock);
+                spin_lock_irq(&uport->lock);
+                ops->stop_tx(uport);
+                ops->set_mctrl(uport, 0);
+                ops->stop_rx(uport);
+                spin_unlock_irq(&uport->lock);
 
                 /*
                  * Wait for the transmitter to empty.
                  */
-                for (tries = 3; !ops->tx_empty(port) && tries; tries--)
+                for (tries = 3; !ops->tx_empty(uport) && tries; tries--)
                         msleep(10);
                 if (!tries)
                         printk(KERN_ERR "%s%s%s%d: Unable to drain "
                                         "transmitter\n",
-                               port->dev ? dev_name(port->dev) : "",
-                               port->dev ? ": " : "",
+                               uport->dev ? dev_name(uport->dev) : "",
+                               uport->dev ? ": " : "",
                                drv->dev_name,
-                               drv->tty_driver->name_base + port->line);
+                               drv->tty_driver->name_base + uport->line);
 
-                ops->shutdown(port);
+                ops->shutdown(uport);
         }
 
         /*
          * Disable the console device before suspending.
          */
-        if (uart_console(port))
-                console_stop(port->cons);
+        if (uart_console(uport))
+                console_stop(uport->cons);
 
         uart_change_pm(state, 3);
 
@@ -2050,67 +2050,68 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
         return 0;
 }
 
-int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
+int uart_resume_port(struct uart_driver *drv, struct uart_port *uport)
 {
-        struct uart_state *state = drv->state + port->line;
+        struct uart_state *state = drv->state + uport->line;
+        struct tty_port *port = &state->port;
         struct device *tty_dev;
-        struct uart_match match = {port, drv};
+        struct uart_match match = {uport, drv};
 
         mutex_lock(&state->mutex);
 
-        if (!console_suspend_enabled && uart_console(port)) {
+        if (!console_suspend_enabled && uart_console(uport)) {
                 /* no need to resume serial console, it wasn't suspended */
                 mutex_unlock(&state->mutex);
                 return 0;
         }
 
-        tty_dev = device_find_child(port->dev, &match, serial_match_port);
-        if (!port->suspended && device_may_wakeup(tty_dev)) {
-                disable_irq_wake(port->irq);
+        tty_dev = device_find_child(uport->dev, &match, serial_match_port);
+        if (!uport->suspended && device_may_wakeup(tty_dev)) {
+                disable_irq_wake(uport->irq);
                 mutex_unlock(&state->mutex);
                 return 0;
         }
-        port->suspended = 0;
+        uport->suspended = 0;
 
         /*
          * Re-enable the console device after suspending.
          */
-        if (uart_console(port)) {
+        if (uart_console(uport)) {
                 struct ktermios termios;
 
                 /*
                  * First try to use the console cflag setting.
                  */
                 memset(&termios, 0, sizeof(struct ktermios));
-                termios.c_cflag = port->cons->cflag;
+                termios.c_cflag = uport->cons->cflag;
 
                 /*
                  * If that's unset, use the tty termios setting.
                  */
-                if (state->port.tty && termios.c_cflag == 0)
-                        termios = *state->port.tty->termios;
+                if (port->tty && termios.c_cflag == 0)
+                        termios = *port->tty->termios;
 
                 uart_change_pm(state, 0);
-                port->ops->set_termios(port, &termios, NULL);
-                console_start(port->cons);
+                uport->ops->set_termios(uport, &termios, NULL);
+                console_start(uport->cons);
         }
 
-        if (state->flags & UIF_SUSPENDED) {
-                const struct uart_ops *ops = port->ops;
+        if (port->flags & ASYNC_SUSPENDED) {
+                const struct uart_ops *ops = uport->ops;
                 int ret;
 
                 uart_change_pm(state, 0);
-                spin_lock_irq(&port->lock);
-                ops->set_mctrl(port, 0);
-                spin_unlock_irq(&port->lock);
-                ret = ops->startup(port);
+                spin_lock_irq(&uport->lock);
+                ops->set_mctrl(uport, 0);
+                spin_unlock_irq(&uport->lock);
+                ret = ops->startup(uport);
                 if (ret == 0) {
                         uart_change_speed(state, NULL);
-                        spin_lock_irq(&port->lock);
-                        ops->set_mctrl(port, port->mctrl);
-                        ops->start_tx(port);
-                        spin_unlock_irq(&port->lock);
-                        state->flags |= UIF_INITIALIZED;
+                        spin_lock_irq(&uport->lock);
+                        ops->set_mctrl(uport, uport->mctrl);
+                        ops->start_tx(uport);
+                        spin_unlock_irq(&uport->lock);
+                        set_bit(ASYNCB_INITIALIZED, &port->flags);
                 } else {
                         /*
                          * Failed to resume - maybe hardware went away?
@@ -2120,7 +2121,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
                         uart_shutdown(state);
                 }
 
-                state->flags &= ~UIF_SUSPENDED;
+                clear_bit(ASYNCB_SUSPENDED, &port->flags);
         }
 
         mutex_unlock(&state->mutex);
diff --git a/include/linux/serial.h b/include/linux/serial.h
index e5bb75a63802..c8613c3ff9d3 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -122,6 +122,7 @@ struct serial_uart_config {
 
 /* Internal flags used only by kernel */
 #define ASYNCB_INITIALIZED      31 /* Serial port was initialized */
+#define ASYNCB_SUSPENDED        30 /* Serial port is suspended */
 #define ASYNCB_NORMAL_ACTIVE    29 /* Normal device is active */
 #define ASYNCB_BOOT_AUTOCONF    28 /* Autoconfigure port on bootup */
 #define ASYNCB_CLOSING          27 /* Serial port is closing */
@@ -133,6 +134,7 @@ struct serial_uart_config {
 #define ASYNCB_FIRST_KERNEL     22
 
 #define ASYNC_HUP_NOTIFY        (1U << ASYNCB_HUP_NOTIFY)
+#define ASYNC_SUSPENDED         (1U << ASYNCB_SUSPENDED)
 #define ASYNC_FOURPORT          (1U << ASYNCB_FOURPORT)
 #define ASYNC_SAK               (1U << ASYNCB_SAK)
 #define ASYNC_SPLIT_TERMIOS     (1U << ASYNCB_SPLIT_TERMIOS)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 63ad90966db2..284ef7f54890 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -20,6 +20,8 @@
 #ifndef LINUX_SERIAL_CORE_H
 #define LINUX_SERIAL_CORE_H
 
+#include <linux/serial.h>
+
 /*
  * The type definitions.  These are from Ted Ts'o's serial.h
  */
@@ -356,19 +358,6 @@ struct uart_state {
 
         int                     pm_state;
         struct circ_buf         xmit;
-        uif_t                   flags;
-
-/*
- * Definitions for info->flags.  These are _private_ to serial_core, and
- * are specific to this structure.  They may be queried by low level drivers.
- *
- * FIXME: use the ASY_ definitions
- */
-#define UIF_CHECK_CD            ((__force uif_t) (1 << 25))
-#define UIF_CTS_FLOW            ((__force uif_t) (1 << 26))
-#define UIF_NORMAL_ACTIVE       ((__force uif_t) (1 << 29))
-#define UIF_INITIALIZED         ((__force uif_t) (1 << 31))
-#define UIF_SUSPENDED           ((__force uif_t) (1 << 30))
 
         struct tasklet_struct   tlet;
         wait_queue_head_t       delta_msr_wait;
@@ -509,22 +498,23 @@ static inline int uart_handle_break(struct uart_port *port)
  *      @status: new carrier detect status, nonzero if active
  */
 static inline void
-uart_handle_dcd_change(struct uart_port *port, unsigned int status)
+uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
 {
-        struct uart_state *state = port->state;
+        struct uart_state *state = uport->state;
+        struct tty_port *port = &state->port;
 
-        port->icount.dcd++;
+        uport->icount.dcd++;
 
 #ifdef CONFIG_HARD_PPS
-        if ((port->flags & UPF_HARDPPS_CD) && status)
+        if ((uport->flags & UPF_HARDPPS_CD) && status)
                 hardpps();
 #endif
 
-        if (state->flags & UIF_CHECK_CD) {
+        if (port->flags & ASYNC_CHECK_CD) {
                 if (status)
-                        wake_up_interruptible(&state->port.open_wait);
-                else if (state->port.tty)
-                        tty_hangup(state->port.tty);
+                        wake_up_interruptible(&port->open_wait);
+                else if (port->tty)
+                        tty_hangup(port->tty);
         }
 }
 
@@ -534,24 +524,24 @@ uart_handle_dcd_change(struct uart_port *port, unsigned int status)
  *      @status: new clear to send status, nonzero if active
  */
 static inline void
-uart_handle_cts_change(struct uart_port *port, unsigned int status)
+uart_handle_cts_change(struct uart_port *uport, unsigned int status)
 {
-        struct uart_state *state = port->state;
-        struct tty_struct *tty = state->port.tty;
+        struct tty_port *port = &uport->state->port;
+        struct tty_struct *tty = port->tty;
 
-        port->icount.cts++;
+        uport->icount.cts++;
 
-        if (state->flags & UIF_CTS_FLOW) {
+        if (port->flags & ASYNC_CTS_FLOW) {
                 if (tty->hw_stopped) {
                         if (status) {
                                 tty->hw_stopped = 0;
-                                port->ops->start_tx(port);
-                                uart_write_wakeup(port);
+                                uport->ops->start_tx(uport);
+                                uart_write_wakeup(uport);
                         }
                 } else {
                         if (!status) {
                                 tty->hw_stopped = 1;
-                                port->ops->stop_tx(port);
+                                uport->ops->stop_tx(uport);
                         }
                 }
         }