Patch "iio: proximity: sx9500: claim direct mode during raw proximity reads" has been added to the 4.9-stable tree

Patch "iio: proximity: sx9500: claim direct mode during raw proximity reads" has been added to the 4.9-stable tree

[gregkh]

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

    iio: proximity: sx9500: claim direct mode during raw proximity reads

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:
     iio-proximity-sx9500-claim-direct-mode-during-raw-proximity-reads.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 <stable@vger.kernel.org> know about it.


>From foo@baz Thu Nov  9 09:48:01 CET 2017
From: Alison Schofield <amsfield22@gmail.com>
Date: Fri, 20 Jan 2017 14:11:30 -0800
Subject: iio: proximity: sx9500: claim direct mode during raw proximity reads

From: Alison Schofield <amsfield22@gmail.com>


[ Upstream commit 6b2e7589b82ff534dd5c6d67dd83c53f13691bec ]

Driver was checking for direct mode but not locking it.  Use the
claim/release helper functions to guarantee the device stays in
direct mode during raw reads of proximity data.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Reviewed-by: Vlad Dogaru <ddvlad@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/proximity/sx9500.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/iio/proximity/sx9500.c
+++ b/drivers/iio/proximity/sx9500.c
@@ -387,14 +387,18 @@ static int sx9500_read_raw(struct iio_de
 			   int *val, int *val2, long mask)
 {
 	struct sx9500_data *data = iio_priv(indio_dev);
+	int ret;
 
 	switch (chan->type) {
 	case IIO_PROXIMITY:
 		switch (mask) {
 		case IIO_CHAN_INFO_RAW:
-			if (iio_buffer_enabled(indio_dev))
-				return -EBUSY;
-			return sx9500_read_proximity(data, chan, val);
+			ret = iio_device_claim_direct_mode(indio_dev);
+			if (ret)
+				return ret;
+			ret = sx9500_read_proximity(data, chan, val);
+			iio_device_release_direct_mode(indio_dev);
+			return ret;
 		case IIO_CHAN_INFO_SAMP_FREQ:
 			return sx9500_read_samp_freq(data, val, val2);
 		default:


Patches currently in stable-queue which might be from amsfield22@gmail.com are

queue-4.9/iio-pressure-ms5611-claim-direct-mode-during-oversampling-changes.patch
queue-4.9/iio-proximity-sx9500-claim-direct-mode-during-raw-proximity-reads.patch
queue-4.9/iio-magnetometer-mag3110-claim-direct-mode-during-raw-writes.patch
queue-4.9/iio-trigger-free-trigger-resource-correctly.patch