staging: speakup: Replace BUG_ON() with WARN_ON().

BUG_ON() is replaced with WARN_ON() and EINVAL is returned, when
WARN_ON() is true. This fixes the following checkpatch issue:

Avoid crashing the kernel - try using WARN_ON & recovery code rather
than BUG() or BUG_ON().

Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/speakup/kobjects.c b/drivers/staging/speakup/kobjects.c
index 4ea441d67c323e911566ec32de595485cc8294f8..5d871ec3693c6b50cbfddd530957d96d5c20e96d 100644 (file)
--- a/drivers/staging/speakup/kobjects.c
+++ b/drivers/staging/speakup/kobjects.c
@@ -833,7 +833,9 @@ static ssize_t message_show(struct kobject *kobj,
        struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
        unsigned long flags;
 
-       BUG_ON(!group);
+       if (WARN_ON(!group))
+               return -EINVAL;
+
        spin_lock_irqsave(&speakup_info.spinlock, flags);
        retval = message_show_helper(buf, group->start, group->end);
        spin_unlock_irqrestore(&speakup_info.spinlock, flags);
@@ -845,7 +847,9 @@ static ssize_t message_store(struct kobject *kobj, struct kobj_attribute *attr,
 {
        struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
 
-       BUG_ON(!group);
+       if (WARN_ON(!group))
+               return -EINVAL;
+
        return message_store_helper(buf, count, group);
 }