This is a note to let you know that I've just added the patch titled
USB: cdc-acm: fix TIOCMIWAIT
to the 4.8-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-fix-tiocmiwait.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 18266403f3fe507f0246faa1d5432333a2f139ca Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Tue, 8 Nov 2016 13:10:57 +0100
Subject: USB: cdc-acm: fix TIOCMIWAIT
From: Johan Hovold <johan@xxxxxxxxxx>
commit 18266403f3fe507f0246faa1d5432333a2f139ca upstream.
The TIOCMIWAIT implementation would return -EINVAL if any of the three
supported signals were included in the mask.
Instead of returning an error in case TIOCM_CTS is included, simply
drop the mask check completely, which is in accordance with how other
drivers implement this ioctl.
Fixes: 5a6a62bdb925 ("cdc-acm: add TIOCMIWAIT")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Acked-by: Oliver Neukum <oneukum@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 2 --
1 file changed, 2 deletions(-)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -946,8 +946,6 @@ static int wait_serial_change(struct acm
DECLARE_WAITQUEUE(wait, current);
struct async_icount old, new;
- if (arg & (TIOCM_DSR | TIOCM_RI | TIOCM_CD))
- return -EINVAL;
do {
spin_lock_irq(&acm->read_lock);
old = acm->oldcount;
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.8/usb-cdc-acm-fix-tiocmiwait.patch
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