From: Fugang Duan <b38611@freescale.com>
Date: Thu, 16 Jul 2015 06:49:09 +0000 (+0800)
Subject: iio: adc: vf610: fix the adc register read fail issue
X-Git-Tag: v3.16.35~1572
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=54f22a7f92c33ad342693b1cac549c9b7a324273;p=thirdparty%2Fkernel%2Fstable.git

iio: adc: vf610: fix the adc register read fail issue

commit bf604a4c44a91cc2ceb60d4643a091b6b32cc999 upstream.

Read the register only when the adc register address is 4 byte aligned.
(rather than the other way around).

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---

diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index 11048473b89eb..0062d0e71d03f 100644
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -555,7 +555,7 @@ static int vf610_adc_reg_access(struct iio_dev *indio_dev,
 	struct vf610_adc *info = iio_priv(indio_dev);
 
 	if ((readval == NULL) ||
-		(!(reg % 4) || (reg > VF610_REG_ADC_PCTL)))
+		((reg % 4) || (reg > VF610_REG_ADC_PCTL)))
 		return -EINVAL;
 
 	*readval = readl(info->regs + reg);