This is a note to let you know that I've just added the patch titled
USB: serial: add modem-status-change wait queue
to the 3.4-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:
usb-serial-add-modem-status-change-wait-queue.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e5b33dc9d16053c2ae4c2c669cf008829530364b Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Tue, 19 Mar 2013 09:21:10 +0100
Subject: USB: serial: add modem-status-change wait queue
From: Johan Hovold <jhovold@xxxxxxxxx>
commit e5b33dc9d16053c2ae4c2c669cf008829530364b upstream.
Add modem-status-change wait queue to struct usb_serial_port that
subdrivers can use to implement TIOCMIWAIT.
Currently subdrivers use a private wait queue which may have been
released when waking up after device disconnected.
Note that we're adding a new wait queue rather than reusing the tty-port
one as we do not want to get woken up at hangup (yet).
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/usb/serial.h | 2 ++
1 file changed, 2 insertions(+)
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -66,6 +66,7 @@
* port.
* @flags: usb serial port flags
* @write_wait: a wait_queue_head_t used by the port.
+ * @delta_msr_wait: modem-status-change wait queue
* @work: work queue entry for the line discipline waking up.
* @throttled: nonzero if the read urb is inactive to throttle the device
* @throttle_req: nonzero if the tty wants to throttle us
@@ -112,6 +113,7 @@ struct usb_serial_port {
unsigned long flags;
wait_queue_head_t write_wait;
+ wait_queue_head_t delta_msr_wait;
struct work_struct work;
char throttled;
char throttle_req;
Patches currently in stable-queue which might be from jhovold@xxxxxxxxx are
queue-3.4/usb-serial-fix-hang-when-opening-port.patch
queue-3.4/usb-serial-add-modem-status-change-wait-queue.patch
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