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author | Johan Hovold <johan@kernel.org> | 2021-04-07 12:39:22 +0200 |
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committer | Johan Hovold <johan@kernel.org> | 2021-04-08 09:46:02 +0200 |
commit | f64d74a59c476df7d5abbddc23011f0d8475c7cc (patch) | |
tree | aaadc42209bad01aade6b89e05e1f9451043d0b5 /drivers/usb/serial/pl2303.c | |
parent | 01fd45f676f1b3785b7cdd5d815f9c31ddcd9dd1 (diff) | |
download | linux-stable-f64d74a59c476df7d5abbddc23011f0d8475c7cc.tar.gz linux-stable-f64d74a59c476df7d5abbddc23011f0d8475c7cc.tar.bz2 linux-stable-f64d74a59c476df7d5abbddc23011f0d8475c7cc.zip |
USB: serial: stop reporting legacy UART types
The TIOCGSERIAL ioctl can be used to set and retrieve the UART type for
legacy UARTs, but some USB serial drivers have been reporting back
random types in order to "make user-space happy".
Some applications have historically expected TIOCGSERIAL to be
implemented, but judging from the Debian sources, the port type not
being PORT_UNKNOWN is only used to check for the existence of legacy
serial ports (ttySn).
Drivers like ftdi_sio have been using PORT_UNKNOWN for twenty years (and
option for 10 years) without anyone complaining so let's stop reporting
back anything else.
In the unlikely event that this do cause problems, this should be fixed
tree-wide anyway (e.g. for all USB serial drivers and also CDC-ACM).
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/pl2303.c')
-rw-r--r-- | drivers/usb/serial/pl2303.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 64f08a45eb46..fd773d252691 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -1048,11 +1048,6 @@ static int pl2303_carrier_raised(struct usb_serial_port *port) return 0; } -static void pl2303_get_serial(struct tty_struct *tty, struct serial_struct *ss) -{ - ss->type = PORT_16654; -} - static void pl2303_set_break(struct usb_serial_port *port, bool enable) { struct usb_serial *serial = port->serial; @@ -1236,7 +1231,6 @@ static struct usb_serial_driver pl2303_device = { .close = pl2303_close, .dtr_rts = pl2303_dtr_rts, .carrier_raised = pl2303_carrier_raised, - .get_serial = pl2303_get_serial, .break_ctl = pl2303_break_ctl, .set_termios = pl2303_set_termios, .tiocmget = pl2303_tiocmget, |