[B.A.T.M.A.N.] [PATCH] batman-adv: add sanity check when removing global tts

[Simon Wunderlich <simon.wunderlich@s2003.tu-chemnitz.de>]

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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>
---
 translation-table.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/translation-table.c b/translation-table.c
index c2af2b1..ffa846c 100644
--- a/translation-table.c
+++ b/translation-table.c
@@ -712,6 +712,9 @@ 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];
-- 
1.7.7



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