From: Johan Hovold <johan@kernel.org>
To: Johan Hovold <johan@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Manivannan Sadhasivam <mani@kernel.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] USB: serial: xr: fix CSIZE handling
Date: Tue, 30 Mar 2021 16:37:16 +0200 [thread overview]
Message-ID: <20210330143716.9042-1-johan@kernel.org> (raw)
The XR21V141X does not have a 5- or 6-bit mode, but the current
implementation failed to properly restore the old setting when CS5 or
CS6 was requested. Instead an invalid request would be sent to the
device.
Fixes: c2d405aa86b4 ("USB: serial: add MaxLinear/Exar USB to Serial driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/usb/serial/xr_serial.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index 0ca04906da4b..c59c8b47a120 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -467,6 +467,11 @@ static void xr_set_termios(struct tty_struct *tty,
termios->c_cflag &= ~CSIZE;
if (old_termios)
termios->c_cflag |= old_termios->c_cflag & CSIZE;
+ else
+ termios->c_cflag |= CS8;
+
+ if (C_CSIZE(tty) == CS7)
+ bits |= XR21V141X_UART_DATA_7;
else
bits |= XR21V141X_UART_DATA_8;
break;
--
2.26.3
next reply other threads:[~2021-03-30 14:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-30 14:37 Johan Hovold [this message]
2021-03-30 18:12 ` [PATCH] USB: serial: xr: fix CSIZE handling Manivannan Sadhasivam
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