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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>
This commit is contained in:
Arvind Yadav 2017-05-09 16:00:28 +05:30 committed by Tejun Heo
parent 8bfd174312
commit 5dc63fdcc0
1 changed files with 12 additions and 3 deletions
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15
drivers/ata/sata_rcar.c
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@ -890,7 +890,10 @@ static int sata_rcar_probe(struct platform_device *pdev)
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 device *dev)
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 device *dev)
{
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);