diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/rocket.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c index 0e29a23ec4c5..79c3bc69165a 100644 --- a/drivers/char/rocket.c +++ b/drivers/char/rocket.c @@ -73,7 +73,6 @@ #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/serial.h> -#include <linux/smp_lock.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/ptrace.h> @@ -1017,6 +1016,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp) if (tty_port_close_start(port, tty, filp) == 0) return; + mutex_lock(&port->mutex); cp = &info->channel; /* * Before we drop DTR, make sure the UART transmitter @@ -1060,9 +1060,13 @@ static void rp_close(struct tty_struct *tty, struct file *filp) info->xmit_buf = NULL; } } + spin_lock_irq(&port->lock); info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE); tty->closing = 0; + spin_unlock_irq(&port->lock); + mutex_unlock(&port->mutex); tty_port_tty_set(port, NULL); + wake_up_interruptible(&port->close_wait); complete_all(&info->close_wait); atomic_dec(&rp_num_ports_open); @@ -1210,11 +1214,13 @@ static int get_config(struct r_port *info, struct rocket_config __user *retinfo) if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof (tmp)); + mutex_lock(&info->port.mutex); tmp.line = info->line; tmp.flags = info->flags; tmp.close_delay = info->port.close_delay; tmp.closing_wait = info->port.closing_wait; tmp.port = rcktpt_io_addr[(info->line >> 5) & 3]; + mutex_unlock(&info->port.mutex); if (copy_to_user(retinfo, &tmp, sizeof (*retinfo))) return -EFAULT; @@ -1229,10 +1235,13 @@ static int set_config(struct tty_struct *tty, struct r_port *info, if (copy_from_user(&new_serial, new_info, sizeof (new_serial))) return -EFAULT; + mutex_lock(&info->port.mutex); if (!capable(CAP_SYS_ADMIN)) { - if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) + if ((new_serial.flags & ~ROCKET_USR_MASK) != (info->flags & ~ROCKET_USR_MASK)) { + mutex_unlock(&info->port.mutex); return -EPERM; + } info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK)); configure_r_port(tty, info, NULL); return 0; @@ -1250,6 +1259,7 @@ static int set_config(struct tty_struct *tty, struct r_port *info, tty->alt_speed = 230400; if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP) tty->alt_speed = 460800; + mutex_unlock(&info->port.mutex); configure_r_port(tty, info, NULL); return 0; @@ -1325,8 +1335,6 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file, if (cmd != RCKP_GET_PORTS && rocket_paranoia_check(info, "rp_ioctl")) return -ENXIO; - lock_kernel(); - switch (cmd) { case RCKP_GET_STRUCT: if (copy_to_user(argp, info, sizeof (struct r_port))) @@ -1350,7 +1358,6 @@ static int rp_ioctl(struct tty_struct *tty, struct file *file, default: ret = -ENOIOCTLCMD; } - unlock_kernel(); return ret; } @@ -1471,7 +1478,6 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout) jiffies); printk(KERN_INFO "cps=%d...\n", info->cps); #endif - lock_kernel(); while (1) { txcnt = sGetTxCnt(cp); if (!txcnt) { @@ -1499,7 +1505,6 @@ static void rp_wait_until_sent(struct tty_struct *tty, int timeout) break; } __set_current_state(TASK_RUNNING); - unlock_kernel(); #ifdef ROCKET_DEBUG_WAIT_UNTIL_SENT printk(KERN_INFO "txcnt = %d (jiff=%lu)...done\n", txcnt, jiffies); #endif @@ -1512,6 +1517,7 @@ static void rp_hangup(struct tty_struct *tty) { CHANNEL_t *cp; struct r_port *info = tty->driver_data; + unsigned long flags; if (rocket_paranoia_check(info, "rp_hangup")) return; @@ -1520,11 +1526,15 @@ static void rp_hangup(struct tty_struct *tty) printk(KERN_INFO "rp_hangup of ttyR%d...\n", info->line); #endif rp_flush_buffer(tty); - if (info->port.flags & ASYNC_CLOSING) + spin_lock_irqsave(&info->port.lock, flags); + if (info->port.flags & ASYNC_CLOSING) { + spin_unlock_irqrestore(&info->port.lock, flags); return; + } if (info->port.count) atomic_dec(&rp_num_ports_open); clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); + spin_unlock_irqrestore(&info->port.lock, flags); tty_port_hangup(&info->port); @@ -1535,7 +1545,7 @@ static void rp_hangup(struct tty_struct *tty) sDisCTSFlowCtl(cp); sDisTxSoftFlowCtl(cp); sClrTxXOFF(cp); - info->port.flags &= ~ASYNC_INITIALIZED; + clear_bit(ASYNCB_INITIALIZED, &info->port.flags); wake_up_interruptible(&info->port.open_wait); } |