linux-kernel - [PATCH 5.18 131/181] iio:proximity:sx9324: Check ret value of device_property_read_u32

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Date:   Mon, 27 Jun 2022 13:21:44 +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, Aashish Sharma <shraash@...gle.com>,
        kernel test robot <lkp@...el.com>,
        Stephen Boyd <swboyd@...omium.org>,
        Gwendal Grignou <gwendal@...omium.org>, Stable@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH 5.18 131/181] iio:proximity:sx9324: Check ret value of device_property_read_u32_array()

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

commit 70171ed6dc53d2f580166d47f5b66cf51a6d0092 upstream.

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>
Reviewed-by: Gwendal Grignou <gwendal@...omium.org>
Link: https://lore.kernel.org/r/20220613232224.2466278-1-swboyd@chromium.org
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/proximity/sx9324.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/iio/proximity/sx9324.c
+++ b/drivers/iio/proximity/sx9324.c
@@ -885,6 +885,9 @@ sx9324_get_default_reg(struct device *de
 			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);