From: <gregkh@linuxfoundation.org>
To: brgl@bgdev.pl, gregkh@linuxfoundation.org, linus.walleij@linaro.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "gpiolib: fix filtering out unwanted events" has been added to the 4.11-stable tree
Date: Mon, 03 Jul 2017 09:57:44 +0200 [thread overview]
Message-ID: <149906866451169@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
gpiolib: fix filtering out unwanted events
to the 4.11-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-4.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From ad537b822577fcc143325786cd6ad50d7b9df31c Mon Sep 17 00:00:00 2001
From: Bartosz Golaszewski <brgl@bgdev.pl>
Date: Fri, 23 Jun 2017 13:45:16 +0200
Subject: gpiolib: fix filtering out unwanted events
From: Bartosz Golaszewski <brgl@bgdev.pl>
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.
Fixes: 61f922db7221 ("gpio: userspace ABI for reading GPIO line events")
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpio/gpiolib.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -708,7 +708,8 @@ 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 brgl@bgdev.pl are
queue-4.11/gpiolib-fix-filtering-out-unwanted-events.patch
reply other threads:[~2017-07-03 7:57 UTC|newest]
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