linux-kernel - [PATCH v1 17/19] pinctrl: st: Switch to use devm_kasprintf

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Message-Id: <20211105124242.27288-17-andriy.shevchenko@linux.intel.com>
Date:   Fri,  5 Nov 2021 14:42:40 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Jianqun Xu <jay.xu@...k-chips.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@...inx.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
Cc:     Bamvor Jian Zhang <bamv2005@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Michal Simek <michal.simek@...inx.com>,
        Andy Shevchenko <andy@...nel.org>
Subject: [PATCH v1 17/19] pinctrl: st: Switch to use devm_kasprintf_strarray()

Since we have a generic helper, switch the module to use it.

As a side effect, add check for the memory allocation failures and
cleanup it either in error case or when driver is unloading.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/pinctrl-st.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
index 9cb0da88b098..0fea71fd9a00 100644
--- a/drivers/pinctrl/pinctrl-st.c
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -1624,6 +1624,8 @@ static int st_pctl_probe_dt(struct platform_device *pdev,
 	for_each_child_of_node(np, child) {
 		if (of_property_read_bool(child, "gpio-controller")) {
 			const char *bank_name = NULL;
+			char **pin_names;
+
 			ret = st_gpiolib_register_bank(info, bank, child);
 			if (ret) {
 				of_node_put(child);
@@ -1632,10 +1634,16 @@ static int st_pctl_probe_dt(struct platform_device *pdev,
 
 			k = info->banks[bank].range.pin_base;
 			bank_name = info->banks[bank].range.name;
+
+			pin_names = devm_kasprintf_strarray(dev, bank_name, ST_GPIO_PINS_PER_BANK);
+			if (IS_ERR(pin_names)) {
+				of_node_put(child);
+				return PTR_ERR(pin_names);
+			}
+
 			for (j = 0; j < ST_GPIO_PINS_PER_BANK; j++, k++) {
 				pdesc->number = k;
-				pdesc->name = kasprintf(GFP_KERNEL, "%s[%d]",
-							bank_name, j);
+				pdesc->name = pin_names[j];
 				pdesc++;
 			}
 			st_parse_syscfgs(info, bank, child);
-- 
2.33.0