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USB: opticon: fix return value of tiocmset

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Make sure we return 0 or a negative error number appropriate for
userspace on errors.

Currently 1 rather than 0 is returned on successful operation.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-21 12:37:42 +01:00 committed by Greg Kroah-Hartman
parent cf41aa9e19
commit 94c51dca2c
1 changed files with 9 additions and 3 deletions
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12
drivers/usb/serial/opticon.c
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@ -120,7 +120,10 @@ static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
0, 0, buffer, 1, 0);
kfree(buffer);
return retval;
if (retval < 0)
return retval;
return 0;
}
static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
@ -329,10 +332,13 @@ static int opticon_tiocmset(struct tty_struct *tty,
/* Send the new RTS state to the connected device */
mutex_lock(&serial->disc_mutex);
if (!serial->disconnected)
if (!serial->disconnected) {
ret = send_control_msg(port, CONTROL_RTS, !rts);
else
if (ret)
ret = usb_translate_errors(ret);
} else {
ret = -ENODEV;
}
mutex_unlock(&serial->disc_mutex);
return ret;