linux-kernel - [RESEND PATCH 09/11] soundwire: qcom: check of_property

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Message-Id: <20210326091514.20751-10-yung-chuan.liao@linux.intel.com>
Date:   Fri, 26 Mar 2021 17:15:12 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, srinivas.kandagatla@...aro.org,
        rander.wang@...ux.intel.com, hui.wang@...onical.com,
        pierre-louis.bossart@...ux.intel.com, sanyog.r.kale@...el.com,
        bard.liao@...el.com
Subject: [RESEND PATCH 09/11] soundwire: qcom: check of_property_read status

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Cppcheck complains:

drivers/soundwire/qcom.c:773:6: style: Variable 'ret' is assigned a
value that is never used. [unreadVariable]
 ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
     ^

The return value is checked for all other cases, not sure why it was
missed here.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/qcom.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 9cce09cba068..277f711e374d 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -772,6 +772,9 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
 
 	ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
 					bp_mode, nports);
+	if (ret)
+		return ret;
+
 	for (i = 0; i < nports; i++) {
 		ctrl->pconfig[i].si = si[i];
 		ctrl->pconfig[i].off1 = off1[i];
-- 
2.17.1