linux-kernel - [PATCH 4.19 09/88] iio: dac: ad5592r: Fix the missing return value.

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Message-Id: <20220510130734.015700859@linuxfoundation.org>
Date:   Tue, 10 May 2022 15:06:54 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zizhuang Deng <sunsetdzz@...il.com>,
        Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 4.19 09/88] iio: dac: ad5592r: Fix the missing return value.

From: Zizhuang Deng <sunsetdzz@...il.com>

commit b55b38f7cc12da3b9ef36e7a3b7f8f96737df4d5 upstream.

The third call to `fwnode_property_read_u32` did not record
the return value, resulting in `channel_offstate` possibly
being assigned the wrong value.

Fixes: 56ca9db862bf ("iio: dac: Add support for the AD5592R/AD5593R ADCs/DACs")
Signed-off-by: Zizhuang Deng <sunsetdzz@...il.com>
Link: https://lore.kernel.org/r/20220310125450.4164164-1-sunsetdzz@gmail.com
Cc: <Stable@...r.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iio/dac/ad5592r-base.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/dac/ad5592r-base.c
+++ b/drivers/iio/dac/ad5592r-base.c
@@ -531,7 +531,7 @@ static int ad5592r_alloc_channels(struct
 		if (!ret)
 			st->channel_modes[reg] = tmp;
 
-		fwnode_property_read_u32(child, "adi,off-state", &tmp);
+		ret = fwnode_property_read_u32(child, "adi,off-state", &tmp);
 		if (!ret)
 			st->channel_offstate[reg] = tmp;
 	}