[PATCH AUTOSEL for 4.9 006/219] staging: speakup: Replace BUG_ON() with WARN_ON().

[Sasha Levin]

From: Varsha Rao <rvarsha...@gmail.com>

[ Upstream commit d351c2db5420bb17dcd2d9aac7ddb5f64c6d04b3 ]

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 <rvarsha...@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thiba...@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/staging/speakup/kobjects.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/speakup/kobjects.c 
b/drivers/staging/speakup/kobjects.c
index e744aa9730ff..dea018cba094 100644
--- a/drivers/staging/speakup/kobjects.c
+++ b/drivers/staging/speakup/kobjects.c
@@ -834,7 +834,9 @@ 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);
@@ -846,7 +848,9 @@ 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);
 }
 
-- 
2.14.1