linux-kernel - [PATCH -next v2] soc: aspeed-lpc-ctrl: Fix missing clk_disable_unprepare() on error in aspeed_lpc_ctrl

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Date:   Tue, 24 Aug 2021 16:55:22 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <linux-aspeed@...ts.ozlabs.org>, <joel@....id.au>,
        <andrew@...id.au>
Subject: [PATCH -next v2] soc: aspeed-lpc-ctrl: Fix missing clk_disable_unprepare() on error in aspeed_lpc_ctrl_probe()

Move syscon_regmap_lookup_by_compatible() above the
devm_clk_get() to avoid missing clk_disable_unprepare().

Fixes: 2f9b25fa6682 ("soc: aspeed: Re-enable FWH2AHB on AST2600")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/soc/aspeed/aspeed-lpc-ctrl.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/soc/aspeed/aspeed-lpc-ctrl.c b/drivers/soc/aspeed/aspeed-lpc-ctrl.c
index 6893c5ec3259..72771e018c42 100644
--- a/drivers/soc/aspeed/aspeed-lpc-ctrl.c
+++ b/drivers/soc/aspeed/aspeed-lpc-ctrl.c
@@ -295,6 +295,16 @@ static int aspeed_lpc_ctrl_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	if (of_device_is_compatible(dev->of_node, "aspeed,ast2600-lpc-ctrl")) {
+		lpc_ctrl->fwh2ahb = true;
+
+		lpc_ctrl->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2600-scu");
+		if (IS_ERR(lpc_ctrl->scu)) {
+			dev_err(dev, "couldn't find scu\n");
+			return PTR_ERR(lpc_ctrl->scu);
+		}
+	}
+
 	lpc_ctrl->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(lpc_ctrl->clk)) {
 		dev_err(dev, "couldn't get clock\n");
@@ -306,16 +316,6 @@ static int aspeed_lpc_ctrl_probe(struct platform_device *pdev)
 		return rc;
 	}
 
-	if (of_device_is_compatible(dev->of_node, "aspeed,ast2600-lpc-ctrl")) {
-		lpc_ctrl->fwh2ahb = true;
-
-		lpc_ctrl->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2600-scu");
-		if (IS_ERR(lpc_ctrl->scu)) {
-			dev_err(dev, "couldn't find scu\n");
-			return PTR_ERR(lpc_ctrl->scu);
-		}
-	}
-
 	lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR;
 	lpc_ctrl->miscdev.name = DEVICE_NAME;
 	lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops;
-- 
2.25.1