| Message ID | 20210407103925.829-17-johan@kernel.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | a3cb01e2fe3793b8ffcb9cc7f7c7f2ca55793e62 |
| Headers | show |
| Series | USB: serial: TIOCSSERIAL fixes and generic support | expand |
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 4e9c994a972a..e71c828682f5 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -166,8 +166,6 @@ int usb_wwan_set_serial_info(struct tty_struct *tty, if ((close_delay != port->port.close_delay) || (closing_wait != port->port.closing_wait)) retval = -EPERM; - else - retval = -EOPNOTSUPP; } else { port->port.close_delay = close_delay; port->port.closing_wait = closing_wait;
TIOCSSERIAL is a horrid, underspecified, legacy interface which for most serial devices is only useful for setting the close_delay and closing_wait parameters. A non-privileged user has only ever been able to set the since long deprecated ASYNC_SPD flags and trying to change any other *supported* feature should result in -EPERM being returned. Setting the current values for any supported features should return success. Fix the usb_wwan implementation which instead indicated that the TIOCSSERIAL ioctl was not even implemented when a non-privileged user set the current values. Fixes: 02303f73373a ("usb-wwan: implement TIOCGSERIAL and TIOCSSERIAL to avoid blocking close(2)") Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/usb/serial/usb_wwan.c | 2 -- 1 file changed, 2 deletions(-)