p54: refactor statistic timer code

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c
index 7ddb93b..fcde424 100644 (file)
--- a/drivers/net/wireless/p54/p54common.c
+++ b/drivers/net/wireless/p54/p54common.c
@@ -1151,19 +1151,32 @@ static int p54_set_edcf(struct ieee80211_hw *dev)
        return 0;
 }
 
-static int p54_start(struct ieee80211_hw *dev)
+static int p54_init_stats(struct ieee80211_hw *dev)
 {
        struct p54_common *priv = dev->priv;
-       int err;
+       struct p54_control_hdr *hdr;
+       struct p54_statistics *stats;
 
-       if (!priv->cached_stats) {
-               priv->cached_stats = kzalloc(sizeof(struct p54_statistics) +
-                       priv->tx_hdr_len + sizeof(struct p54_control_hdr),
-                       GFP_KERNEL);
+       priv->cached_stats = kzalloc(priv->tx_hdr_len +
+                       sizeof(*hdr) + sizeof(*stats), GFP_KERNEL);
 
-               if (!priv->cached_stats)
+       if (!priv->cached_stats)
                        return -ENOMEM;
-       }
+
+       hdr = (void *) priv->cached_stats + priv->tx_hdr_len;
+       hdr->magic1 = cpu_to_le16(0x8000);
+       hdr->len = cpu_to_le16(sizeof(*stats));
+       hdr->type = cpu_to_le16(P54_CONTROL_TYPE_STAT_READBACK);
+       hdr->retry1 = hdr->retry2 = 0;
+
+       mod_timer(&priv->stats_timer, jiffies + HZ);
+       return 0;
+}
+
+static int p54_start(struct ieee80211_hw *dev)
+{
+       struct p54_common *priv = dev->priv;
+       int err;
 
        err = priv->open(dev);
        if (!err)
@@ -1174,7 +1187,7 @@ static int p54_start(struct ieee80211_hw *dev)
        P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
        err = p54_set_edcf(dev);
        if (!err)
-               mod_timer(&priv->stats_timer, jiffies + HZ);
+               err = p54_init_stats(dev);
 
        return err;
 }
@@ -1185,6 +1198,8 @@ static void p54_stop(struct ieee80211_hw *dev)
        struct sk_buff *skb;
 
        del_timer(&priv->stats_timer);
+       kfree(priv->cached_stats);
+       priv->cached_stats = NULL;
        while ((skb = skb_dequeue(&priv->tx_queue)))
                kfree_skb(skb);
        priv->stop(dev);
@@ -1346,11 +1361,7 @@ static void p54_statistics_timer(unsigned long data)
        struct p54_statistics *stats;
 
        BUG_ON(!priv->cached_stats);
-
-       hdr = (void *)priv->cached_stats + priv->tx_hdr_len;
-       hdr->magic1 = cpu_to_le16(0x8000);
-       hdr->len = cpu_to_le16(sizeof(*stats));
-       hdr->type = cpu_to_le16(P54_CONTROL_TYPE_STAT_READBACK);
+       hdr = (void *) priv->cached_stats + priv->tx_hdr_len;
        p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*stats));
 
        priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*stats), 0);