From 1eac494738a0447ef0c423ee2066f85a44ab59f5 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 30 Apr 2008 00:53:19 -0700 Subject: [PATCH] isicom: prepare for lock_kernel push down Again lock the bits we can't trivially prove are safe without the BKL and remove the broken TIOCS/GSOFTCAR handler. Signed-off-by: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/isicom.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c index eba2883b630e..a69e4bb91ad4 100644 --- a/drivers/char/isicom.c +++ b/drivers/char/isicom.c @@ -1258,6 +1258,8 @@ static int isicom_set_serial_info(struct isi_port *port, if (copy_from_user(&newinfo, info, sizeof(newinfo))) return -EFAULT; + lock_kernel(); + reconfig_port = ((port->flags & ASYNC_SPD_MASK) != (newinfo.flags & ASYNC_SPD_MASK)); @@ -1265,8 +1267,10 @@ static int isicom_set_serial_info(struct isi_port *port, if ((newinfo.close_delay != port->close_delay) || (newinfo.closing_wait != port->closing_wait) || ((newinfo.flags & ~ASYNC_USR_MASK) != - (port->flags & ~ASYNC_USR_MASK))) + (port->flags & ~ASYNC_USR_MASK))) { + unlock_kernel(); return -EPERM; + } port->flags = ((port->flags & ~ ASYNC_USR_MASK) | (newinfo.flags & ASYNC_USR_MASK)); } @@ -1282,6 +1286,7 @@ static int isicom_set_serial_info(struct isi_port *port, isicom_config_port(port); spin_unlock_irqrestore(&port->card->card_lock, flags); } + unlock_kernel(); return 0; } @@ -1290,6 +1295,7 @@ static int isicom_get_serial_info(struct isi_port *port, { struct serial_struct out_info; + lock_kernel(); memset(&out_info, 0, sizeof(out_info)); /* out_info.type = ? */ out_info.line = port - isi_ports; @@ -1299,6 +1305,7 @@ static int isicom_get_serial_info(struct isi_port *port, /* out_info.baud_base = ? */ out_info.close_delay = port->close_delay; out_info.closing_wait = port->closing_wait; + unlock_kernel(); if (copy_to_user(info, &out_info, sizeof(out_info))) return -EFAULT; return 0; @@ -1331,19 +1338,6 @@ static int isicom_ioctl(struct tty_struct *tty, struct file *filp, tty_wait_until_sent(tty, 0); isicom_send_break(port, arg ? arg * (HZ/10) : HZ/4); return 0; - - case TIOCGSOFTCAR: - return put_user(C_CLOCAL(tty) ? 1 : 0, - (unsigned long __user *)argp); - - case TIOCSSOFTCAR: - if (get_user(arg, (unsigned long __user *) argp)) - return -EFAULT; - tty->termios->c_cflag = - ((tty->termios->c_cflag & ~CLOCAL) | - (arg ? CLOCAL : 0)); - return 0; - case TIOCGSERIAL: return isicom_get_serial_info(port, argp); -- 2.20.1