net: cw1200: fix a NULL pointer dereference

In case create_singlethread_workqueue fails, the fix free the
hardware and returns NULL to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>

diff --git a/drivers/net/wireless/st/cw1200/main.c b/drivers/net/wireless/st/cw1200/main.c
index 90dc979f260b600c2aad6683122c1b9ba5aa6984..c1608f0bf6d017d9fc5be100dfd5a25ce3054599 100644 (file)
--- a/drivers/net/wireless/st/cw1200/main.c
+++ b/drivers/net/wireless/st/cw1200/main.c
@@ -345,6 +345,11 @@ static struct ieee80211_hw *cw1200_init_common(const u8 *macaddr,
        mutex_init(&priv->wsm_cmd_mux);
        mutex_init(&priv->conf_mutex);
        priv->workqueue = create_singlethread_workqueue("cw1200_wq");
+       if (!priv->workqueue) {
+               ieee80211_free_hw(hw);
+               return NULL;
+       }
+
        sema_init(&priv->scan.lock, 1);
        INIT_WORK(&priv->scan.work, cw1200_scan_work);
        INIT_DELAYED_WORK(&priv->scan.probe_work, cw1200_probe_work);