This is a note to let you know that I've just added the patch titled
cdc-acm: fix BREAK rx code path adding necessary calls
to the 4.4-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:
cdc-acm-fix-break-rx-code-path-adding-necessary-calls.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 08dff274edda54310d6f1cf27b62fddf0f8d146e Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@xxxxxxxx>
Date: Thu, 11 Mar 2021 14:37:14 +0100
Subject: cdc-acm: fix BREAK rx code path adding necessary calls
From: Oliver Neukum <oneukum@xxxxxxxx>
commit 08dff274edda54310d6f1cf27b62fddf0f8d146e upstream.
Counting break events is nice but we should actually report them to
the tty layer.
Fixes: 5a6a62bdb9257 ("cdc-acm: add TIOCMIWAIT")
Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx>
Link: https://lore.kernel.org/r/20210311133714.31881-1-oneukum@xxxxxxxx
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -334,8 +334,10 @@ static void acm_ctrl_irq(struct urb *urb
acm->iocount.dsr++;
if (difference & ACM_CTRL_DCD)
acm->iocount.dcd++;
- if (newctrl & ACM_CTRL_BRK)
+ if (newctrl & ACM_CTRL_BRK) {
acm->iocount.brk++;
+ tty_insert_flip_char(&acm->port, 0, TTY_BREAK);
+ }
if (newctrl & ACM_CTRL_RI)
acm->iocount.rng++;
if (newctrl & ACM_CTRL_FRAMING)
Patches currently in stable-queue which might be from oneukum@xxxxxxxx are
queue-4.4/usb-cdc-acm-downgrade-message-to-debug.patch
queue-4.4/cdc-acm-fix-break-rx-code-path-adding-necessary-calls.patch
queue-4.4/usb-cdc-acm-fix-use-after-free-after-probe-failure.patch
