From: <gregkh@linuxfoundation.org>
To: anders@chargestorm.se, alexandre.belloni@free-electrons.com,
gregkh@linuxfoundation.org, jic23@kernel.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "iio: adc: at91: unbreak channel adc channel 3" has been added to the 4.4-stable tree
Date: Thu, 22 Sep 2016 15:41:46 +0200 [thread overview]
Message-ID: <147455170651149@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
iio: adc: at91: unbreak channel adc channel 3
to the 4.4-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:
iio-adc-at91-unbreak-channel-adc-channel-3.patch
and it can be found in the queue-4.4 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 c2ab447454d498e709d9011c0f2d2945ee321f9b Mon Sep 17 00:00:00 2001
From: Anders Darander <anders@chargestorm.se>
Date: Mon, 8 Aug 2016 14:42:16 +0200
Subject: iio: adc: at91: unbreak channel adc channel 3
From: Anders Darander <anders@chargestorm.se>
commit c2ab447454d498e709d9011c0f2d2945ee321f9b upstream.
The driver always assumes that an input device has been created when
reading channel 3. This causes a kernel panic when dereferencing
st->ts_input.
The change was introduced in
commit 84882b060301 ("iio: adc: at91_adc: Add support for touchscreens
without TSMR"). Earlier versions only entered that part of the if-else
statement if only the following flags are set:
AT91_ADC_IER_XRDY | AT91_ADC_IER_YRDY | AT91_ADC_IER_PRDY
Signed-off-by: Anders Darander <anders@chargestorm.se>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/iio/adc/at91_adc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -381,8 +381,8 @@ static irqreturn_t at91_adc_rl_interrupt
st->ts_bufferedmeasure = false;
input_report_key(st->ts_input, BTN_TOUCH, 0);
input_sync(st->ts_input);
- } else if (status & AT91_ADC_EOC(3)) {
- /* Conversion finished */
+ } else if (status & AT91_ADC_EOC(3) && st->ts_input) {
+ /* Conversion finished and we've a touchscreen */
if (st->ts_bufferedmeasure) {
/*
* Last measurement is always discarded, since it can
Patches currently in stable-queue which might be from anders@chargestorm.se are
queue-4.4/iio-adc-at91-unbreak-channel-adc-channel-3.patch
reply other threads:[~2016-09-22 13:42 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=147455170651149@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=alexandre.belloni@free-electrons.com \
--cc=anders@chargestorm.se \
--cc=jic23@kernel.org \
--cc=stable-commits@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.