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mac802154: tx: squash multiple dereferencing

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This patch introduce some new stack variables to avoid multiple
dereferencing inside the xmit worker function.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-10-26 09:37:03 +01:00 committed by Marcel Holtmann
parent fe24371d66
commit e89e45f22a
1 changed files with 12 additions and 11 deletions
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23
net/mac802154/tx.c
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@ -48,37 +48,38 @@ static inline struct wpan_xmit_cb *wpan_xmit_cb(const struct sk_buff *skb)
static void mac802154_xmit_worker(struct work_struct *work)
{
struct wpan_xmit_cb *cb = container_of(work, struct wpan_xmit_cb, work);
struct ieee802154_local *local = cb->local;
struct ieee802154_sub_if_data *sdata;
struct sk_buff *skb = cb->skb;
int res;
mutex_lock(&cb->local->phy->pib_lock);
if (cb->local->phy->current_channel != cb->chan ||
cb->local->phy->current_page != cb->page) {
res = cb->local->ops->set_channel(&cb->local->hw, cb->page,
cb->chan);
mutex_lock(&local->phy->pib_lock);
if (local->phy->current_channel != cb->chan ||
local->phy->current_page != cb->page) {
res = local->ops->set_channel(&local->hw, cb->page, cb->chan);
if (res) {
pr_debug("set_channel failed\n");
goto out;
}
cb->local->phy->current_channel = cb->chan;
cb->local->phy->current_page = cb->page;
local->phy->current_channel = cb->chan;
local->phy->current_page = cb->page;
}
res = cb->local->ops->xmit(&cb->local->hw, cb->skb);
res = local->ops->xmit(&local->hw, skb);
if (res)
pr_debug("transmission failed\n");
out:
mutex_unlock(&cb->local->phy->pib_lock);
mutex_unlock(&local->phy->pib_lock);
/* Restart the netif queue on each sub_if_data object. */
rcu_read_lock();
list_for_each_entry_rcu(sdata, &cb->local->interfaces, list)
list_for_each_entry_rcu(sdata, &local->interfaces, list)
netif_wake_queue(sdata->dev);
rcu_read_unlock();
dev_kfree_skb(cb->skb);
dev_kfree_skb(skb);
}
static netdev_tx_t mac802154_tx(struct ieee802154_local *local,