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path: root/drivers/tty/mxser.c
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Diffstat (limited to 'drivers/tty/mxser.c')
-rw-r--r--drivers/tty/mxser.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 71d6eb2c93b..4c4a2367456 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1618,8 +1618,12 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
if (ip->type == PORT_16550A)
me->fifo[p] = 1;
- opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
- opmode &= OP_MODE_MASK;
+ if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
+ opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
+ opmode &= OP_MODE_MASK;
+ } else {
+ opmode = RS232_MODE;
+ }
me->iftype[p] = opmode;
mutex_unlock(&port->mutex);
}
@@ -1676,6 +1680,9 @@ static int mxser_ioctl(struct tty_struct *tty,
int shiftbit;
unsigned char val, mask;
+ if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
+ return -EFAULT;
+
p = tty->index % 4;
if (cmd == MOXA_SET_OP_MODE) {
if (get_user(opmode, (int __user *) argp))