Patch "gpiolib: fix filtering out unwanted events" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

gpiolib: fix filtering out unwanted events

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:
gpiolib-fix-filtering-out-unwanted-events.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 <[email protected]> know about it.

From: Bartosz Golaszewski <[email protected]>
Date: Fri, 23 Jun 2017 13:45:16 +0200
Subject: gpiolib: fix filtering out unwanted events

From: Bartosz Golaszewski <[email protected]>

commit ad537b822577fcc143325786cd6ad50d7b9df31c upstream.

GPIOEVENT_REQUEST_BOTH_EDGES is not a single flag, but a binary OR of GPIOEVENT_REQUEST_RISING_EDGE and GPIOEVENT_REQUEST_FALLING_EDGE.

The expression 'le->eflags & GPIOEVENT_REQUEST_BOTH_EDGES' we'll get evaluated to true even if only one event type was requested.

Fix it by checking both RISING & FALLING flags explicitly.

---
 drivers/gpio/gpiolib.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -707,7 +707,8 @@ static irqreturn_t lineevent_irq_thread(
 
 	ge.timestamp = ktime_get_real_ns();
 
-	if (le->eflags & GPIOEVENT_REQUEST_BOTH_EDGES) {
+	if (le->eflags & GPIOEVENT_REQUEST_RISING_EDGE
+	    && le->eflags & GPIOEVENT_REQUEST_FALLING_EDGE) {
 		int level = gpiod_get_value_cansleep(le->desc);
 
 		if (level)

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/gpiolib-fix-filtering-out-unwanted-events.patch