staging: greybus: uart: fix TIOCSSERIAL jiffies conversions

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

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

Fixes: e68453ed28c5 ("greybus: uart-gb: now builds, more framework added")
Cc: stable@vger.kernel.org	# 4.9
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20210407102334.32361-6-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index 607378b..29846dc 100644 (file)
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -614,10 +614,12 @@ static int get_serial_info(struct tty_struct *tty,
        ss->line = gb_tty->minor;
        ss->xmit_fifo_size = 16;
        ss->baud_base = 9600;
-       ss->close_delay = gb_tty->port.close_delay / 10;
+       ss->close_delay = jiffies_to_msecs(gb_tty->port.close_delay) / 10;
        ss->closing_wait =
                gb_tty->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
-               ASYNC_CLOSING_WAIT_NONE : gb_tty->port.closing_wait / 10;
+               ASYNC_CLOSING_WAIT_NONE :
+               jiffies_to_msecs(gb_tty->port.closing_wait) / 10;
+
        return 0;
 }
 
@@ -629,9 +631,10 @@ static int set_serial_info(struct tty_struct *tty,
        unsigned int 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(&gb_tty->port.mutex);
        if (!capable(CAP_SYS_ADMIN)) {