This is a note to let you know that I've just added the patch titled
USB: cdc-acm: only raise DTR on transitions from B0
to the 3.14-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-cdc-acm-only-raise-dtr-on-transitions-from-b0.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4473d054ceb572557954f9536731d39b20937b0c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Wed, 5 Nov 2014 18:41:59 +0100
Subject: USB: cdc-acm: only raise DTR on transitions from B0
From: Johan Hovold <johan@xxxxxxxxxx>
commit 4473d054ceb572557954f9536731d39b20937b0c upstream.
Make sure to only raise DTR on transitions from B0 in set_termios.
Also allow set_termios to be called from open with a termios_old of
NULL. Note that DTR will not be raised prematurely in this case.
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -965,11 +965,12 @@ static void acm_tty_set_termios(struct t
/* FIXME: Needs to clear unsupported bits in the termios */
acm->clocal = ((termios->c_cflag & CLOCAL) != 0);
- if (!newline.dwDTERate) {
+ if (C_BAUD(tty) == B0) {
newline.dwDTERate = acm->line.dwDTERate;
newctrl &= ~ACM_CTRL_DTR;
- } else
+ } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) {
newctrl |= ACM_CTRL_DTR;
+ }
if (newctrl != acm->ctrlout)
acm_set_control(acm, acm->ctrlout = newctrl);
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-3.14/usb-option-add-haier-ce81b-cdma-modem.patch
queue-3.14/usb-cdc-acm-add-device-id-for-gw-instek-afg-2225.patch
queue-3.14/usb-option-add-support-for-telit-le910.patch
queue-3.14/usb-serial-ftdi_sio-add-awinda-station-and-dongle-products.patch
queue-3.14/usb-serial-cp210x-add-silicon-labs-358x-vid-and-pid.patch
queue-3.14/usb-cdc-acm-only-raise-dtr-on-transitions-from-b0.patch
queue-3.14/usb-serial-ftdi_sio-add-bricked-ftdi-device-pid.patch
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