linux-kernel - [PATCH AUTOSEL 4.20 45/77] serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190215020855.176727-45-sashal@kernel.org>
Date:   Thu, 14 Feb 2019 21:08:23 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tomonori Sakita <tomonori.sakita@...d.co.jp>,
        Atsushi Nemoto <atsushi.nemoto@...d.co.jp>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, linux-serial@...r.kernel.org
Subject: [PATCH AUTOSEL 4.20 45/77] serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling

From: Tomonori Sakita <tomonori.sakita@...d.co.jp>

[ Upstream commit 815d835b7ba46685c316b000013367dacb2b461b ]

Using over-sampling ratio, lpuart can accept baud rate upto uartclk / 4.

Signed-off-by: Tomonori Sakita <tomonori.sakita@...d.co.jp>
Signed-off-by: Atsushi Nemoto <atsushi.nemoto@...d.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tty/serial/fsl_lpuart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 00c220e4f43c..989b95af1b95 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1693,7 +1693,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
 	}
 
 	/* ask the core to calculate the divisor */
-	baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
+	baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 4);
 
 	spin_lock_irqsave(&sport->port.lock, flags);
 
-- 
2.19.1