The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From b71e571adaa58be4fd289abebc8997e05b4c6b40 Mon Sep 17 00:00:00 2001
From: Johan Hovold johan@kernel.org Date: Wed, 7 Apr 2021 12:23:23 +0200 Subject: [PATCH] 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 607378bfebb7..29846dc1e1bf 100644 --- 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)) {