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 my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>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
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(-)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 39ddb5585ded..b013671261a2 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -313,8 +313,10 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf)
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)
--
2.31.0
