This is a note to let you know that I've just added the patch titled
USB: serial: ftdi_sio: fix FTX sub-integer prescaler
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-serial-ftdi_sio-fix-ftx-sub-integer-prescaler.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 528222d0c8ce93e435a95cd1e476b60409dd5381 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Tue, 26 Jan 2021 14:59:17 +0100
Subject: USB: serial: ftdi_sio: fix FTX sub-integer prescaler
From: Johan Hovold <johan@xxxxxxxxxx>
commit 528222d0c8ce93e435a95cd1e476b60409dd5381 upstream.
The most-significant bit of the sub-integer-prescaler index is set in
the high byte of the baudrate request wIndex also for FTX devices.
This fixes rates like 1152000 which got mapped to 1.2 MBd.
Reported-by: Vladimir <svv75@xxxxxxx>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=210351
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/ftdi_sio.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1386,8 +1386,9 @@ static int change_speed(struct tty_struc
index_value = get_ftdi_divisor(tty, port);
value = (u16)index_value;
index = (u16)(index_value >> 16);
- if ((priv->chip_type == FT2232C) || (priv->chip_type == FT2232H) ||
- (priv->chip_type == FT4232H) || (priv->chip_type == FT232H)) {
+ if (priv->chip_type == FT2232C || priv->chip_type == FT2232H ||
+ priv->chip_type == FT4232H || priv->chip_type == FT232H ||
+ priv->chip_type == FTX) {
/* Probably the BM type needs the MSB of the encoded fractional
* divider also moved like for the chips above. Any infos? */
index = (u16)((index << 8) | priv->interface);
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-5.11/usb-serial-pl2303-fix-line-speed-handling-on-newer-chips.patch
queue-5.11/usb-serial-mos7840-fix-error-code-in-mos7840_write.patch
queue-5.11/usb-serial-mos7720-fix-error-code-in-mos7720_write.patch
queue-5.11/usb-serial-ftdi_sio-fix-ftx-sub-integer-prescaler.patch
queue-5.11/usb-serial-option-update-interface-mapping-for-zte-p685m.patch
