USB: fix memory leak in berry_charge driver

This fixes a small memory leak that happens every time the device is
plugged in.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/misc/berry_charge.c b/drivers/usb/misc/berry_charge.c
index 92c1d27..24e2dc3 100644
--- a/drivers/usb/misc/berry_charge.c
+++ b/drivers/usb/misc/berry_charge.c
@@ -71,7 +71,7 @@
 	if (retval != 2) {
 		dev_err(&udev->dev, "First magic command failed: %d.\n",
 			retval);
-		return retval;
+		goto exit;
 	}
 
 	dbg(&udev->dev, "Sending second magic command\n");
@@ -80,7 +80,7 @@
 	if (retval != 0) {
 		dev_err(&udev->dev, "Second magic command failed: %d.\n",
 			retval);
-		return retval;
+		goto exit;
 	}
 
 	dbg(&udev->dev, "Calling set_configuration\n");
@@ -88,6 +88,8 @@
 	if (retval)
 		dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
 
+exit:
+	kfree(dummy_buffer);
 	return retval;
 }
 
@@ -112,6 +114,7 @@
 	if (retval)
 		dev_err(&udev->dev, "Set Configuration failed :%d.\n", retval);
 
+	kfree(dummy_buffer);
 	return retval;
 }