From: Johan Hovold <johan@kernel.org>
To: Johan Hovold <johan@kernel.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] USB: serial: xr: avoid requesting zero DTE rate
Date: Tue, 29 Nov 2022 15:18:57 +0100 [thread overview]
Message-ID: <20221129141857.15363-1-johan@kernel.org> (raw)
When the requested line speed is B0 (hangup) there is no need to use the
current speed in the line-coding request. This specifically avoids
requesting a zero DTE rate when the current speed is B0, which could
potentially confuse buggy firmware.
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/usb/serial/xr_serial.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index f3811e060a44..fdb0aae546c3 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -749,8 +749,6 @@ static void xr_cdc_set_line_coding(struct tty_struct *tty,
if (tty->termios.c_ospeed)
lc->dwDTERate = cpu_to_le32(tty->termios.c_ospeed);
- else if (old_termios)
- lc->dwDTERate = cpu_to_le32(old_termios->c_ospeed);
else
lc->dwDTERate = cpu_to_le32(9600);
--
2.37.4
next reply other threads:[~2022-11-29 14:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-29 14:18 Johan Hovold [this message]
2022-11-30 11:09 ` [PATCH] USB: serial: xr: avoid requesting zero DTE rate Greg KH
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