Patch "iio:ad7266: Fix probe deferral for vref" has been added to the 3.14-stable tree

Patch "iio:ad7266: Fix probe deferral for vref" has been added to the 3.14-stable tree

[gregkh]

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

    iio:ad7266: Fix probe deferral for vref

to the 3.14-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-ad7266-fix-probe-deferral-for-vref.patch
and it can be found in the queue-3.14 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 68b356eb3d9f5e38910fb62e22a78e2a18d544ae Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@kernel.org>
Date: Mon, 20 Jun 2016 13:53:34 +0100
Subject: iio:ad7266: Fix probe deferral for vref

From: Mark Brown <broonie@kernel.org>

commit 68b356eb3d9f5e38910fb62e22a78e2a18d544ae upstream.

Currently the ad7266 driver treats any failure to get vref as though the
regulator were not present but this means that if probe deferral is
triggered the driver will act as though the regulator were not present.
Instead only use the internal reference if we explicitly got -ENODEV which
is what is returned for absent regulators.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/ad7266.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -408,6 +408,9 @@ static int ad7266_probe(struct spi_devic
 
 		st->vref_mv = ret / 1000;
 	} else {
+		/* Any other error indicates that the regulator does exist */
+		if (PTR_ERR(st->reg) != -ENODEV)
+			return PTR_ERR(st->reg);
 		/* Use internal reference */
 		st->vref_mv = 2500;
 	}


Patches currently in stable-queue which might be from broonie@kernel.org are

queue-3.14/iio-ad7266-fix-probe-deferral-for-vref.patch
queue-3.14/iio-ad7266-fix-broken-regulator-error-handling.patch
queue-3.14/iio-ad7266-fix-support-for-optional-regulators.patch