patches.renesas/0109-ata-sata_rcar-Handle-return-value-of-clk_prepare_ena.patch

From 37ca7df9881ca9ef9440fede4b128272fb4dbbcc Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Tue, 9 May 2017 16:00:28 +0530
Subject: [PATCH 109/286] ata: sata_rcar: Handle return value of
 clk_prepare_enable

Here, Clock enable can failed. So adding an error check for
clk_prepare_enable.

tj: minor style updates

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit 5dc63fdcc09f47fb226b8bc7d83a61feb787d817)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/ata/sata_rcar.c |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -890,7 +890,10 @@ static int sata_rcar_probe(struct platfo
 		dev_err(&pdev->dev, "failed to get access to sata clock\n");
 		return PTR_ERR(priv->clk);
 	}
-	clk_prepare_enable(priv->clk);
+
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
 
 	host = ata_host_alloc(&pdev->dev, 1);
 	if (!host) {
@@ -970,8 +973,11 @@ static int sata_rcar_resume(struct devic
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct sata_rcar_priv *priv = host->private_data;
 	void __iomem *base = priv->base;
+	int ret;
 
-	clk_prepare_enable(priv->clk);
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
 
 	/* ack and mask */
 	iowrite32(0, base + SATAINTSTAT_REG);
@@ -988,8 +994,11 @@ static int sata_rcar_restore(struct devi
 {
 	struct ata_host *host = dev_get_drvdata(dev);
 	struct sata_rcar_priv *priv = host->private_data;
+	int ret;
 
-	clk_prepare_enable(priv->clk);
+	ret = clk_prepare_enable(priv->clk);
+	if (ret)
+		return ret;
 
 	sata_rcar_setup_port(host);