[PATCH 37/45] usb: ehci-atmel: Check result of clk_enable()

[Andrey Smirnov]

Signed-off-by: Andrey Smirnov <andrew.smirnov at gmail.com>
---
 drivers/usb/host/ehci-atmel.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index cc9636c..fa9ca7d 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -32,10 +32,20 @@
 /* interface and function clocks; sometimes also an AHB clock */
 static struct clk *iclk, *fclk;
 
-static void atmel_start_clock(void)
+static int atmel_start_clock(void)
 {
-	clk_enable(iclk);
-	clk_enable(fclk);
+	int ret;
+	ret = clk_enable(iclk);
+	if (ret < 0) {
+		pr_err("Error enabling interface clock\n");
+		return ret;
+	}
+
+	ret = clk_enable(fclk);
+	if (ret < 0)
+		pr_err("Error enabling function clock\n");
+
+	return ret;
 }
 
 static void atmel_stop_clock(void)
@@ -46,6 +56,7 @@ static void atmel_stop_clock(void)
 
 static int atmel_ehci_probe(struct device_d *dev)
 {
+	int ret;
 	struct resource *iores;
 	struct ehci_data data;
 
@@ -64,7 +75,9 @@ static int atmel_ehci_probe(struct device_d *dev)
 	/*
 	 * Start the USB clocks.
 	 */
-	atmel_start_clock();
+	ret = atmel_start_clock();
+	if (ret < 0)
+		return ret;
 
 	data.flags = 0;
 
-- 
2.9.3