From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 5 Aug 2019 14:25:35 +0000 (+0300)
Subject: serial: 8250_exar: Replace msleep(1) with usleep_range()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3f72879e005ecec835ec75f7d8455c04b29de045;p=linux.git

serial: 8250_exar: Replace msleep(1) with usleep_range()

As explained in Documentation/timers/timers-howto.rst
the small amount of milliseconds sometimes produces
much longer delays.

Replace msleep(1) with usleep_range(1000, 1100).

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190805142535.21948-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 873aa6b0c2f3f..597eb9d16f21f 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -180,7 +180,7 @@ static void exar_shutdown(struct uart_port *port)
 			tx_complete = 1;
 		else
 			tx_complete = 0;
-		msleep(1);
+		usleep_range(1000, 1100);
 	} while (!uart_circ_empty(xmit) && !tx_complete && i++ < 1000);
 
 	serial8250_do_shutdown(port);