linux-kernel - [PATCH] iio:proximity:sx9324: Check ret value of device_property_read_u32

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Message-Id: <20220613232224.2466278-1-swboyd@chromium.org>
Date:   Mon, 13 Jun 2022 16:22:24 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Aashish Sharma <shraash@...gle.com>, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev, linux-iio@...r.kernel.org,
        Gwendal Grignou <gwendal@...omium.org>,
        kernel test robot <lkp@...el.com>
Subject: [PATCH] iio:proximity:sx9324: Check ret value of device_property_read_u32_array()

From: Aashish Sharma <shraash@...gle.com>

0-day reports:

drivers/iio/proximity/sx9324.c:868:3: warning: Value stored
to 'ret' is never read [clang-analyzer-deadcode.DeadStores]

Put an if condition to break out of switch if ret is non-zero.

Signed-off-by: Aashish Sharma <shraash@...gle.com>
Fixes: a8ee3b32f5da ("iio:proximity:sx9324: Add dt_binding support")
Reported-by: kernel test robot <lkp@...el.com>
[swboyd@...omium.org: Reword commit subject, add fixes tag]
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
 drivers/iio/proximity/sx9324.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c
index 70c37f664f6d..63fbcaa4cac8 100644
--- a/drivers/iio/proximity/sx9324.c
+++ b/drivers/iio/proximity/sx9324.c
@@ -885,6 +885,9 @@ sx9324_get_default_reg(struct device *dev, int idx,
 			break;
 		ret = device_property_read_u32_array(dev, prop, pin_defs,
 						     ARRAY_SIZE(pin_defs));
+		if (ret)
+			break;
+
 		for (pin = 0; pin < SX9324_NUM_PINS; pin++)
 			raw |= (pin_defs[pin] << (2 * pin)) &
 			       SX9324_REG_AFE_PH0_PIN_MASK(pin);

base-commit: f2906aa863381afb0015a9eb7fefad885d4e5a56
-- 
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