From: Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de>
Date: Wed, 19 Oct 2011 08:28:26 +0000 (+0200)
Subject: batman-adv: add sanity check when removing global tts
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6e8014947d6469df1566e9e253805557c5c0e4e0;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

batman-adv: add sanity check when removing global tts

After removing the batman-adv module, the hash may be already gone
when tt_global_del_orig() tries to clean the hash. This patch adds
a sanity check to avoid this.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Tested-by: Alexey Fisher <bug-track@fisher-privat.net>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
---

diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index ca537ed2dd0a..d58fd8b9c818 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -698,6 +698,9 @@ void tt_global_del_orig(struct bat_priv *bat_priv,
 	struct hlist_head *head;
 	spinlock_t *list_lock; /* protects write access to the hash lists */
 
+	if (!hash)
+		return;
+
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 		list_lock = &hash->list_locks[i];