ENGR00217717 mfgtool firmware will crash during mfgtool running

- the root cause of this issue is there is no protection for
  the resource which will be accessed by multiple thread

Signed-off-by: Tony LIU <junjie.liu@freescale.com>

diff --git a/drivers/usb/gadget/fsl_updater.c b/drivers/usb/gadget/fsl_updater.c
index 01b35f31cba7ac724bc358a3482e8e62101496a6..39175d6d4c482982309b5bf315c74d8292ba48e4 100644 (file)
--- a/drivers/usb/gadget/fsl_updater.c
+++ b/drivers/usb/gadget/fsl_updater.c
@@ -1,7 +1,7 @@
 /*
  * Freescale UUT driver
  *
- * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ * Copyright 2008-2012 Freescale Semiconductor, Inc.
  * Copyright 2008-2009 Embedded Alley Solutions, Inc All Rights Reserved.
  */
 
@@ -71,9 +71,11 @@ static u32 count_list(struct list_head *l)
        u32 count = 0;
        struct list_head *tmp;
 
+       mutex_lock(&utp_context.lock);
        list_for_each(tmp, l) {
                count++;
        }
+       mutex_unlock(&utp_context.lock);
 
        return count;
 }