[PATCH 3.16 104/328] mac802154: common tx error path

Ben Hutchings
2018-12-09T22:25:13Z

From: Varka Bhadram <varkab@cdac.in>

commit f55889128a776b51581394b20abd0b470304cf95 upstream.

This patch introduce the common error path on failure of Tx by
inserting the label 'err_tx'.

Signed-off-by: Varka Bhadram <varkab@cdac.in>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
net/mac802154/tx.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)

--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -89,8 +89,7 @@ netdev_tx_t mac802154_tx(struct mac80215

if (!(priv->phy->channels_supported[page] & (1 << chan))) {
WARN_ON(1);
- kfree_skb(skb);
- return NETDEV_TX_OK;
+ goto err_tx;
}

mac802154_monitors_rx(mac802154_to_priv(&priv->hw), skb);
@@ -102,12 +101,10 @@ netdev_tx_t mac802154_tx(struct mac80215
data[1] = crc >> 8;
}

- if (skb_cow_head(skb, priv->hw.extra_tx_headroom)) {
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
+ if (skb_cow_head(skb, priv->hw.extra_tx_headroom))
+ goto err_tx;

- work = kzalloc(sizeof(struct xmit_work), GFP_ATOMIC);
+ work = kzalloc(sizeof(*work), GFP_ATOMIC);
if (!work) {
kfree_skb(skb);
return NETDEV_TX_BUSY;
@@ -128,4 +125,8 @@ netdev_tx_t mac802154_tx(struct mac80215
queue_work(priv->dev_workqueue, &work->work);

return NETDEV_TX_OK;
+
+err_tx:
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
}