linux-kernel - [PATCH v4 03/23] pinctrl: equilibrium: Unshadow error code of of_property_count_u32

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Date:   Wed, 29 Nov 2023 18:06:26 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Biju Das <biju.das.jz@...renesas.com>,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
        Jianlong Huang <jianlong.huang@...rfivetech.com>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        openbmc@...ts.ozlabs.org, linux-mips@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Cc:     Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Dong Aisheng <aisheng.dong@....com>,
        Fabio Estevam <festevam@...il.com>,
        Shawn Guo <shawnguo@...nel.org>, Jacky Bai <ping.bai@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Sean Wang <sean.wang@...nel.org>,
        Paul Cercueil <paul@...pouillou.net>,
        Lakshmi Sowjanya D <lakshmi.sowjanya.d@...el.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Hal Feng <hal.feng@...rfivetech.com>
Subject: [PATCH v4 03/23] pinctrl: equilibrium: Unshadow error code of of_property_count_u32_elems()

of_property_count_u32_elems() might return an error code in some cases.
It's naturally better to assign what it's returned to the err variable
and supply the real code to the upper layer(s). Besides that, it's a
common practice to avoid assignments for the data in cases when we know
that the error condition happened. Refactor the code accordingly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/pinctrl-equilibrium.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-equilibrium.c b/drivers/pinctrl/pinctrl-equilibrium.c
index 5b5ddf7e5d0e..54755b583d3f 100644
--- a/drivers/pinctrl/pinctrl-equilibrium.c
+++ b/drivers/pinctrl/pinctrl-equilibrium.c
@@ -715,12 +715,13 @@ static int eqbr_build_groups(struct eqbr_pinctrl_drv_data *drvdata)
 		if (!prop)
 			continue;
 
-		group.num_pins = of_property_count_u32_elems(np, "pins");
-		if (group.num_pins < 0) {
+		err = of_property_count_u32_elems(np, "pins");
+		if (err < 0) {
 			dev_err(dev, "No pins in the group: %s\n", prop->name);
 			of_node_put(np);
-			return -EINVAL;
+			return err;
 		}
+		group.num_pins = err;
 		group.name = prop->value;
 		group.pins = devm_kcalloc(dev, group.num_pins,
 					  sizeof(*(group.pins)), GFP_KERNEL);
-- 
2.43.0.rc1.1.gbec44491f096