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USB: serial: f81534: fix TIOCGSERIAL implementation 

TIOCSSERIAL is a horrid, underspecified, legacy interface which for most
serial devices is only useful for setting the close_delay and
closing_wait parameters.

The port parameter is used to set the I/O port and does not make any
sense to use for USB serial devices.

The close_delay and closing_wait parameters returned by TIOCGSERIAL are
specified in centiseconds. The driver does not yet support changing
these, but let's report back the default values actually used (0.5 and
30 seconds, respectively).

Fixes: aac1fc386f ("USB: serial: add Fintek F81232 usb to serial driver")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2021-04-07 12:39:04 +02:00
parent 5486a9dd37
commit 5c1426df9b
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/serial/f81534.c
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@ -1149,9 +1149,11 @@ static int f81534_get_serial_info(struct tty_struct *tty,
port_priv = usb_get_serial_port_data(port);
ss->type = PORT_16550A;
ss->port = port->port_number;
ss->line = port->minor;
ss->baud_base = port_priv->baud_base;
ss->close_delay = 50;
ss->closing_wait = 3000;
return 0;
}