patch "iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999" added to staging-linus

patch "iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999" added to staging-linus

[gregkh]

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

    iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999

to my staging git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


>From 7d3cc21dab5313a02f2f3ca8164529b828a030d1 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 11 Jul 2016 13:54:17 +0200
Subject: iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999

The data buffer for captured mode for the ad799x driver is allocated in the
update_scan_mode() callback. This callback is not set in the iio_info
struct for the ad7791/ad7995/ad7999, which means that the data buffer is
not allocated when a captured transfer is started. As a result the driver
crashes when the first sample is received. To fix this properly set the
update_scan_mode() callback.

Fixes: d8dca33027c1 ("staging:iio:ad799x: Preallocate sample buffer")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---
 drivers/iio/adc/ad799x.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index b6163764489c..9704090b7908 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -527,6 +527,7 @@ static struct attribute_group ad799x_event_attrs_group = {
 static const struct iio_info ad7991_info = {
 	.read_raw = &ad799x_read_raw,
 	.driver_module = THIS_MODULE,
+	.update_scan_mode = ad799x_update_scan_mode,
 };
 
 static const struct iio_info ad7993_4_7_8_noirq_info = {
-- 
2.9.3