Pull misc-for-upstream into release branch

[linux-2.6-omap-h63xx.git] / drivers / char / amiserial.c

diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 9d6713a93ed74ddb74adaf18aa85fd22e0ee6508..0e2b72f2b8871d96f124581bba1ee724c2f936c0 100644 (file)
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -104,7 +104,7 @@ static struct async_struct *IRQ_ports;
 
 static unsigned char current_ctl_bits;
 
-static void change_speed(struct async_struct *info, struct termios *old);
+static void change_speed(struct async_struct *info, struct ktermios *old);
 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
 
 
@@ -112,17 +112,6 @@ static struct serial_state rs_table[1];
 
 #define NR_PORTS ARRAY_SIZE(rs_table)
 
-/*
- * tmp_buf is used as a temporary buffer by serial_write.  We need to
- * lock it in case the copy_from_user blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-
 #include <asm/uaccess.h>
 
 #define serial_isroot()        (capable(CAP_SYS_ADMIN))
@@ -458,7 +447,7 @@ static void check_modem_status(struct async_struct *info)
        }
 }
 
-static irqreturn_t ser_vbl_int( int irq, void *data, struct pt_regs *regs)
+static irqreturn_t ser_vbl_int( int irq, void *data)
 {
         /* vbl is just a periodic interrupt we tie into to update modem status */
        struct async_struct * info = IRQ_ports;
@@ -471,7 +460,7 @@ static irqreturn_t ser_vbl_int( int irq, void *data, struct pt_regs *regs)
        return IRQ_HANDLED;
 }
 
-static irqreturn_t ser_rx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_rx_int(int irq, void *dev_id)
 {
        struct async_struct * info;
 
@@ -491,7 +480,7 @@ static irqreturn_t ser_rx_int(int irq, void *dev_id, struct pt_regs * regs)
        return IRQ_HANDLED;
 }
 
-static irqreturn_t ser_tx_int(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ser_tx_int(int irq, void *dev_id)
 {
        struct async_struct * info;
 
@@ -538,10 +527,8 @@ static void do_softint(unsigned long private_)
        if (!tty)
                return;
 
-       if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
+       if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
                tty_wakeup(tty);
-               wake_up_interruptible(&tty->write_wait);
-       }
 }
 
 /*
@@ -705,7 +692,7 @@ static void shutdown(struct async_struct * info)
  * the specified baud rate for a serial port.
  */
 static void change_speed(struct async_struct *info,
-                        struct termios *old_termios)
+                        struct ktermios *old_termios)
 {
        int     quot = 0, baud_base, baud;
        unsigned cflag, cval = 0;
@@ -912,11 +899,10 @@ static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count
        if (serial_paranoia_check(info, tty->name, "rs_write"))
                return 0;
 
-       if (!info->xmit.buf || !tmp_buf)
+       if (!info->xmit.buf)
                return 0;
 
-       local_save_flags(flags);
-       local_irq_disable();
+       local_irq_save(flags);
        while (1) {
                c = CIRC_SPACE_TO_END(info->xmit.head,
                                      info->xmit.tail,
@@ -979,7 +965,6 @@ static void rs_flush_buffer(struct tty_struct *tty)
        local_irq_save(flags);
        info->xmit.head = info->xmit.tail = 0;
        local_irq_restore(flags);
-       wake_up_interruptible(&tty->write_wait);
        tty_wakeup(tty);
 }
 
@@ -1376,7 +1361,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
        return 0;
 }
 
-static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
        struct async_struct *info = (struct async_struct *)tty->driver_data;
        unsigned long flags;
@@ -1778,7 +1763,6 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
 {
        struct async_struct     *info;
        int                     retval, line;
-       unsigned long           page;
 
        line = tty->index;
        if ((line < 0) || (line >= NR_PORTS)) {
@@ -1798,17 +1782,6 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
 #endif
        info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
-       if (!tmp_buf) {
-               page = get_zeroed_page(GFP_KERNEL);
-               if (!page) {
-                       return -ENOMEM;
-               }
-               if (tmp_buf)
-                       free_page(page);
-               else
-                       tmp_buf = (unsigned char *) page;
-       }
-
        /*
         * If the port is the middle of closing, bail out now
         */
@@ -1958,7 +1931,7 @@ static void show_serial_version(void)
 }
 
 
-static struct tty_operations serial_ops = {
+static const struct tty_operations serial_ops = {
        .open = rs_open,
        .close = rs_close,
        .write = rs_write,
@@ -2090,11 +2063,6 @@ static __exit void rs_exit(void)
          kfree(info);
        }
 
-       if (tmp_buf) {
-               free_page((unsigned long) tmp_buf);
-               tmp_buf = NULL;
-       }
-
        release_mem_region(CUSTOM_PHYSADDR+0x30, 4);
 }