diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/riscom8.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c index b02332a5412..af4de1fe844 100644 --- a/drivers/char/riscom8.c +++ b/drivers/char/riscom8.c @@ -47,7 +47,6 @@ #include <linux/init.h> #include <linux/delay.h> #include <linux/tty_flip.h> -#include <linux/smp_lock.h> #include <linux/spinlock.h> #include <linux/device.h> @@ -1184,6 +1183,7 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, if (copy_from_user(&tmp, newinfo, sizeof(tmp))) return -EFAULT; + mutex_lock(&port->port.mutex); change_speed = ((port->port.flags & ASYNC_SPD_MASK) != (tmp.flags & ASYNC_SPD_MASK)); @@ -1191,8 +1191,10 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, if ((tmp.close_delay != port->port.close_delay) || (tmp.closing_wait != port->port.closing_wait) || ((tmp.flags & ~ASYNC_USR_MASK) != - (port->port.flags & ~ASYNC_USR_MASK))) + (port->port.flags & ~ASYNC_USR_MASK))) { + mutex_unlock(&port->port.mutex); return -EPERM; + } port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | (tmp.flags & ASYNC_USR_MASK)); } else { @@ -1208,6 +1210,7 @@ static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, rc_change_speed(tty, bp, port); spin_unlock_irqrestore(&riscom_lock, flags); } + mutex_unlock(&port->port.mutex); return 0; } @@ -1220,12 +1223,15 @@ static int rc_get_serial_info(struct riscom_port *port, memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_CIRRUS; tmp.line = port - rc_port; + + mutex_lock(&port->port.mutex); tmp.port = bp->base; tmp.irq = bp->irq; tmp.flags = port->port.flags; tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; tmp.close_delay = port->port.close_delay * HZ/100; tmp.closing_wait = port->port.closing_wait * HZ/100; + mutex_unlock(&port->port.mutex); tmp.xmit_fifo_size = CD180_NFIFO; return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; } @@ -1242,14 +1248,10 @@ static int rc_ioctl(struct tty_struct *tty, struct file *filp, switch (cmd) { case TIOCGSERIAL: - lock_kernel(); retval = rc_get_serial_info(port, argp); - unlock_kernel(); break; case TIOCSSERIAL: - lock_kernel(); retval = rc_set_serial_info(tty, port, argp); - unlock_kernel(); break; default: retval = -ENOIOCTLCMD; |