linux-kernel - [PATCH] USB: serial: ftdi_sio: fix 300 bps rate for SIO

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Message-Id: <20220913145312.20782-1-johan@kernel.org>
Date:   Tue, 13 Sep 2022 16:53:12 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Pali Rohár <pali@...nel.org>,
        Marek Behún <kabel@...nel.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: [PATCH] USB: serial: ftdi_sio: fix 300 bps rate for SIO

The 300 bps rate of SIO devices has been mapped to 9600 bps since
2003... Let's fix the regression.

Cc: stable@...r.kernel.org
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/usb/serial/ftdi_sio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 52d59be92034..787e63fd7f99 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1319,8 +1319,7 @@ static u32 get_ftdi_divisor(struct tty_struct *tty,
 		case 38400: div_value = ftdi_sio_b38400; break;
 		case 57600: div_value = ftdi_sio_b57600;  break;
 		case 115200: div_value = ftdi_sio_b115200; break;
-		} /* baud */
-		if (div_value == 0) {
+		default:
 			dev_dbg(dev, "%s - Baudrate (%d) requested is not supported\n",
 				__func__,  baud);
 			div_value = ftdi_sio_b9600;
-- 
2.35.1