[PATCH net-next 11/12] wifi: wilc1000: Convert using devm_clk_get_optional_enabled() in wilc_sdio_probe()

[Li Zetao]

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, drop
the clk_disable_unprepare label, and the original error process can change
to dispose_irq.

Signed-off-by: Li Zetao <lizetao1 at huawei.com>
---
 drivers/net/wireless/microchip/wilc1000/sdio.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index 0043f7a0fdf9..a09ea24074e2 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -174,19 +174,18 @@ static int wilc_sdio_probe(struct sdio_func *func,
 	wilc->bus_data = sdio_priv;
 	wilc->dev = &func->dev;
 
-	wilc->rtc_clk = devm_clk_get_optional(&func->card->dev, "rtc");
+	wilc->rtc_clk = devm_clk_get_optional_enabled(&func->card->dev, "rtc");
 	if (IS_ERR(wilc->rtc_clk)) {
 		ret = PTR_ERR(wilc->rtc_clk);
 		goto dispose_irq;
 	}
-	clk_prepare_enable(wilc->rtc_clk);
 
 	wilc_sdio_init(wilc, false);
 
 	ret = wilc_load_mac_from_nv(wilc);
 	if (ret) {
 		pr_err("Can not retrieve MAC address from chip\n");
-		goto clk_disable_unprepare;
+		goto dispose_irq;
 	}
 
 	wilc_sdio_deinit(wilc);
@@ -195,14 +194,12 @@ static int wilc_sdio_probe(struct sdio_func *func,
 				   NL80211_IFTYPE_STATION, false);
 	if (IS_ERR(vif)) {
 		ret = PTR_ERR(vif);
-		goto clk_disable_unprepare;
+		goto dispose_irq;
 	}
 
 	dev_info(&func->dev, "Driver Initializing success\n");
 	return 0;
 
-clk_disable_unprepare:
-	clk_disable_unprepare(wilc->rtc_clk);
 dispose_irq:
 	irq_dispose_mapping(wilc->dev_irq_num);
 	wilc_netdev_cleanup(wilc);
@@ -217,7 +214,6 @@ static void wilc_sdio_remove(struct sdio_func *func)
 	struct wilc *wilc = sdio_get_drvdata(func);
 	struct wilc_sdio *sdio_priv = wilc->bus_data;
 
-	clk_disable_unprepare(wilc->rtc_clk);
 	wilc_netdev_cleanup(wilc);
 	kfree(sdio_priv->cmd53_buf);
 	kfree(sdio_priv);
-- 
2.34.1