This is a note to let you know that I've just added the patch titled
USB: serial: opticon: fix CTS retrieval at open
to the 4.9-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-opticon-fix-cts-retrieval-at-open.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2eee05020a0e7ee7c04422cbacdb07859e45dce6 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Fri, 13 Jan 2017 13:21:08 +0100
Subject: USB: serial: opticon: fix CTS retrieval at open
From: Johan Hovold <johan@xxxxxxxxxx>
commit 2eee05020a0e7ee7c04422cbacdb07859e45dce6 upstream.
The opticon driver used a control request at open to trigger a CTS
status notification to be sent over the bulk-in pipe. When the driver
was converted to using the generic read implementation, an inverted test
prevented this request from being sent, something which could lead to
TIOCMGET reporting an incorrect CTS state.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Fixes: 7a6ee2b02751 ("USB: opticon: switch to generic read implementation")
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/opticon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -142,7 +142,7 @@ static int opticon_open(struct tty_struc
usb_clear_halt(port->serial->dev, port->read_urb->pipe);
res = usb_serial_generic_open(tty, port);
- if (!res)
+ if (res)
return res;
/* Request CTS line state, sometimes during opening the current
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.9/usb-serial-ftdi_sio-fix-modem-status-error-handling.patch
queue-4.9/usb-serial-cp210x-add-new-ids-for-ge-bx50v3-boards.patch
queue-4.9/usb-serial-ark3116-fix-register-accessor-error-handling.patch
queue-4.9/usb-serial-digi_acceleport-fix-oob-data-sanity-check.patch
queue-4.9/usb-serial-ftdi_sio-fix-line-status-over-reporting.patch
queue-4.9/usb-serial-ftdi_sio-fix-extreme-low-latency-setting.patch
queue-4.9/usb-serial-spcp8x5-fix-modem-status-handling.patch
queue-4.9/usb-serial-opticon-fix-cts-retrieval-at-open.patch
queue-4.9/usb-serial-mos7840-fix-another-null-deref-at-open.patch
queue-4.9/usb-serial-console-fix-uninitialised-spinlock.patch