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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>,
        Andrew Lunn <andrew@lunn.ch>,
        "David S. Miller" <davem@davemloft.net>
Subject: [PATCH 4.19 026/116] net: phy: mdio-mux-bcm-iproc: check clk_prepare_enable() return value
Date:   Wed,  1 Apr 2020 18:16:42 +0200
Message-Id: <20200401161545.730602252@linuxfoundation.org>
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From: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>

[ Upstream commit 872307abbd0d9afd72171929806c2fa33dc34179 ]

Check clk_prepare_enable() return value.

Fixes: 2c7230446bc9 ("net: phy: Add pm support to Broadcom iProc mdio mux driver")
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/phy/mdio-mux-bcm-iproc.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/net/phy/mdio-mux-bcm-iproc.c
+++ b/drivers/net/phy/mdio-mux-bcm-iproc.c
@@ -301,8 +301,13 @@ static int mdio_mux_iproc_resume(struct
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct iproc_mdiomux_desc *md = platform_get_drvdata(pdev);
+	int rc;
 
-	clk_prepare_enable(md->core_clk);
+	rc = clk_prepare_enable(md->core_clk);
+	if (rc) {
+		dev_err(md->dev, "failed to enable core clk\n");
+		return rc;
+	}
 	mdio_mux_iproc_config(md);
 
 	return 0;