netdev - [PATCH net-next 12/12] wifi: wilc1000: Convert using devm_clk_get_optional_enabled() in wilc_bus

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240831021334.1907921-13-lizetao1@huawei.com>
Date: Sat, 31 Aug 2024 10:13:34 +0800
From: Li Zetao <lizetao1@...wei.com>
To: <florian.fainelli@...adcom.com>, <andrew@...n.ch>, <olteanv@...il.com>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <wens@...e.org>, <jernej.skrabec@...il.com>,
	<samuel@...lland.org>, <heiko@...ech.de>, <yisen.zhuang@...wei.com>,
	<salil.mehta@...wei.com>, <hauke@...ke-m.de>, <alexandre.torgue@...s.st.com>,
	<joabreu@...opsys.com>, <mcoquelin.stm32@...il.com>, <wellslutw@...il.com>,
	<radhey.shyam.pandey@....com>, <michal.simek@....com>,
	<ajay.kathat@...rochip.com>, <claudiu.beznea@...on.dev>, <kvalo@...nel.org>,
	<lizetao1@...wei.com>, <u.kleine-koenig@...gutronix.de>,
	<jacky_chou@...eedtech.com>
CC: <netdev@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-sunxi@...ts.linux.dev>, <linux-rockchip@...ts.infradead.org>,
	<linux-stm32@...md-mailman.stormreply.com>, <linux-wireless@...r.kernel.org>
Subject: [PATCH net-next 12/12] wifi: wilc1000: Convert using devm_clk_get_optional_enabled() in wilc_bus_probe()

Use devm_clk_get_optional_enabled() instead of devm_clk_get_optional() +
clk_prepare_enable(), which can make the clk consistent with the device
life cycle and reduce the risk of unreleased clk resources. Since the
device framework has automatically released the clk resource, there is
no need to execute clk_disable_unprepare(clk) on the error path.

Signed-off-by: Li Zetao <lizetao1@...wei.com>
---
 drivers/net/wireless/microchip/wilc1000/spi.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c
index 5ff940c53ad9..05b577b1068e 100644
--- a/drivers/net/wireless/microchip/wilc1000/spi.c
+++ b/drivers/net/wireless/microchip/wilc1000/spi.c
@@ -228,12 +228,11 @@ static int wilc_bus_probe(struct spi_device *spi)
 	if (ret < 0)
 		goto netdev_cleanup;
 
-	wilc->rtc_clk = devm_clk_get_optional(&spi->dev, "rtc");
+	wilc->rtc_clk = devm_clk_get_optional_enabled(&spi->dev, "rtc");
 	if (IS_ERR(wilc->rtc_clk)) {
 		ret = PTR_ERR(wilc->rtc_clk);
 		goto netdev_cleanup;
 	}
-	clk_prepare_enable(wilc->rtc_clk);
 
 	dev_info(&spi->dev, "Selected CRC config: crc7=%s, crc16=%s\n",
 		 enable_crc7 ? "on" : "off", enable_crc16 ? "on" : "off");
@@ -266,7 +265,6 @@ static int wilc_bus_probe(struct spi_device *spi)
 	return 0;
 
 power_down:
-	clk_disable_unprepare(wilc->rtc_clk);
 	wilc_wlan_power(wilc, false);
 netdev_cleanup:
 	wilc_netdev_cleanup(wilc);
@@ -280,7 +278,6 @@ static void wilc_bus_remove(struct spi_device *spi)
 	struct wilc *wilc = spi_get_drvdata(spi);
 	struct wilc_spi *spi_priv = wilc->bus_data;
 
-	clk_disable_unprepare(wilc->rtc_clk);
 	wilc_netdev_cleanup(wilc);
 	kfree(spi_priv);
 }
-- 
2.34.1