linux-kernel - [PATCH 4.4 108/146] iio:ad7266: Fix broken regulator error handling

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Message-Id: <20160725203525.843920252@linuxfoundation.org>
Date:	Mon, 25 Jul 2016 13:56:03 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH 4.4 108/146] iio:ad7266: Fix broken regulator error handling

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Brown <broonie@...nel.org>

commit 6b7f4e25f3309f106a5c7ff42c8231494cf285d3 upstream.

All regulator_get() variants return either a pointer to a regulator or an
ERR_PTR() so testing for NULL makes no sense and may lead to bugs if we
use NULL as a valid regulator. Fix this by using IS_ERR() as expected.

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

---
 drivers/iio/adc/ad7266.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -397,7 +397,7 @@ static int ad7266_probe(struct spi_devic
 	st = iio_priv(indio_dev);
 
 	st->reg = devm_regulator_get(&spi->dev, "vref");
-	if (!IS_ERR_OR_NULL(st->reg)) {
+	if (!IS_ERR(st->reg)) {
 		ret = regulator_enable(st->reg);
 		if (ret)
 			return ret;