linux-kernel - [PATCH] mailbox: imx: Disable the clock on devm_mbox_controller

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Message-Id: <20200520032246.12482-1-festevam@gmail.com>
Date:   Wed, 20 May 2020 00:22:46 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     jassisinghbrar@...il.com
Cc:     kernel@...gutronix.de, o.rempel@...gutronix.de, linux-imx@....com,
        linux-kernel@...r.kernel.org, Fabio Estevam <festevam@...il.com>
Subject: [PATCH] mailbox: imx: Disable the clock on devm_mbox_controller_register() failure

devm_mbox_controller_register() may fail, and in the case of failure the
priv->clk clock that was previously enabled, should be disabled.

Fixes: 2bb7005696e2 ("mailbox: Add support for i.MX messaging unit")
Signed-off-by: Fabio Estevam <festevam@...il.com>
---
 drivers/mailbox/imx-mailbox.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 7906624a731c..3f7c4548c18f 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -508,7 +508,13 @@ static int imx_mu_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	return devm_mbox_controller_register(dev, &priv->mbox);
+	ret = devm_mbox_controller_register(dev, &priv->mbox);
+	if (ret) {
+		clk_disable_unprepare(priv->clk);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int imx_mu_remove(struct platform_device *pdev)
-- 
2.17.1