Input: pxa27x_keypad - 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>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/drivers/input/keyboard/pxa27x_keypad.c b/drivers/input/keyboard/pxa27x_keypad.c
index 3841fa30db33..d0bdaeadf86d 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 = 0;
 
         /*
          * If the keypad is used as wake up source, the clock is not turned
@@ -695,14 +699,15 @@ static int pxa27x_keypad_resume(struct device *dev)
 
                 if (input_dev->users) {
                         /* Enable unit clock */
-                        clk_prepare_enable(keypad->clk);
-                        pxa27x_keypad_config(keypad);
+                        ret = clk_prepare_enable(keypad->clk);
+                        if (!ret)
+                                pxa27x_keypad_config(keypad);
                 }
 
                 mutex_unlock(&input_dev->mutex);
         }
 
-        return 0;
+        return ret;
 }
 #endif