[PATCH 2/2] Input: pxa27x_keypad: Handle return value of clk_prepare_enable.

[Arvind Yadav]

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/input/keyboard/pxa27x_keypad.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/input/keyboard/pxa27x_keypad.c 
b/drivers/input/keyboard/pxa27x_keypad.c
index 3841fa3..a3396a7 100644
--- a/drivers/input/keyboard/pxa27x_keypad.c
+++ b/drivers/input/keyboard/pxa27x_keypad.c
@@ -644,9 +644,12 @@ static void pxa27x_keypad_config(struct pxa27x_keypad 
*keypad)
 static int pxa27x_keypad_open(struct input_dev *dev)
 {
        struct pxa27x_keypad *keypad = input_get_drvdata(dev);
-
+       int ret;
        /* Enable unit clock */
-       clk_prepare_enable(keypad->clk);
+       ret = clk_prepare_enable(keypad->clk);
+       if (ret)
+               return ret;
+
        pxa27x_keypad_config(keypad);
 
        return 0;
@@ -683,6 +686,7 @@ static int pxa27x_keypad_resume(struct device *dev)
        struct platform_device *pdev = to_platform_device(dev);
        struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
        struct input_dev *input_dev = keypad->input_dev;
+       int ret;
 
        /*
         * If the keypad is used as wake up source, the clock is not turned
@@ -695,7 +699,11 @@ static int pxa27x_keypad_resume(struct device *dev)
 
                if (input_dev->users) {
                        /* Enable unit clock */
-                       clk_prepare_enable(keypad->clk);
+                       ret = clk_prepare_enable(keypad->clk);
+                       if (ret) {
+                               mutex_unlock(&input_dev->mutex);
+                               return ret;
+                       }
                        pxa27x_keypad_config(keypad);
                }
 
-- 
1.9.1