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USB: serial: usb_wwan: fix TIOCSSERIAL jiffies conversions 

commit 3d732690d2267f4d0e19077b178dffbedafdf0c9 upstream.

The port close_delay and closing_wait parameters set by TIOCSSERIAL are
specified in jiffies and not milliseconds.

Add the missing conversions so that the TIOCSSERIAL works as expected
also when HZ is not 1000.

Fixes: 02303f7337 ("usb-wwan: implement TIOCGSERIAL and TIOCSSERIAL to avoid blocking close(2)")
Cc: stable@vger.kernel.org      # 2.6.38
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2021-04-07 12:39:16 +02:00 committed by Greg Kroah-Hartman
parent edce324120
commit 3114fedf40
1 changed files with 5 additions and 4 deletions
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9
drivers/usb/serial/usb_wwan.c
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@ -140,10 +140,10 @@ int usb_wwan_get_serial_info(struct tty_struct *tty,
ss->line = port->minor;
ss->port = port->port_number;
ss->baud_base = tty_get_baud_rate(port->port.tty);
ss->close_delay = port->port.close_delay / 10;
ss->close_delay = jiffies_to_msecs(port->port.close_delay) / 10;
ss->closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE :
port->port.closing_wait / 10;
jiffies_to_msecs(port->port.closing_wait) / 10;
return 0;
}
EXPORT_SYMBOL(usb_wwan_get_serial_info);
@ -155,9 +155,10 @@ int usb_wwan_set_serial_info(struct tty_struct *tty,
unsigned int closing_wait, close_delay;
int retval = 0;
close_delay = ss->close_delay * 10;
close_delay = msecs_to_jiffies(ss->close_delay * 10);
closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE : ss->closing_wait * 10;
ASYNC_CLOSING_WAIT_NONE :
msecs_to_jiffies(ss->closing_wait * 10);
mutex_lock(&port->port.mutex);