usb: mtu3: Handle return value of clk_prepare_enable
clk_prepare_enable() can fail here and we must check its return value.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index 42550c7..0d3ebb3 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -458,6 +458,7 @@ static int __maybe_unused mtu3_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct ssusb_mtk *ssusb = platform_get_drvdata(pdev);
+ int ret;
dev_dbg(dev, "%s\n", __func__);
@@ -465,12 +466,28 @@ static int __maybe_unused mtu3_resume(struct device *dev)
return 0;
ssusb_wakeup_disable(ssusb);
- clk_prepare_enable(ssusb->sys_clk);
- clk_prepare_enable(ssusb->ref_clk);
- ssusb_phy_power_on(ssusb);
+ ret = clk_prepare_enable(ssusb->sys_clk);
+ if (ret)
+ goto err_sys_clk;
+
+ ret = clk_prepare_enable(ssusb->ref_clk);
+ if (ret)
+ goto err_ref_clk;
+
+ ret = ssusb_phy_power_on(ssusb);
+ if (ret)
+ goto err_power_on;
+
ssusb_host_enable(ssusb);
return 0;
+
+err_power_on:
+ clk_disable_unprepare(ssusb->ref_clk);
+err_ref_clk:
+ clk_disable_unprepare(ssusb->sys_clk);
+err_sys_clk:
+ return ret;
}
static const struct dev_pm_ops mtu3_pm_ops = {