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[PATCH] ieee80211: Return NETDEV_TX_BUSY when QoS buffer full

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tree ba6509c7cd1dd4244a2f285f2da5d632e7ffbb25
parent 7b5f9f2ddcabdaea214527a895e6e8445cafdd80
author James Ketrenos <jketreno@linux.intel.com> 1124447000 -0500
committer James Ketrenos <jketreno@linux.intel.com> 1127313383 -0500

Per the conversations with folks at OLS, the QoS layer in 802.11
drivers can now result in NETDEV_TX_BUSY being returned when the queue
a packet is targetted for is full.

To implement this, ieee80211_xmit will now call the driver's
is_queue_full to determine if the current priority queue is full.  If
so, NETDEV_TX_BUSY is returned to the kernel and no processing is done
on the frame.

Signed-off-by: James Ketrenos <jketreno@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
James Ketrenos 2005-09-21 11:56:27 -05:00 committed by Jeff Garzik
parent 1264fc0498
commit 2c0aa2a5c2
1 changed files with 12 additions and 0 deletions
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12
net/ieee80211/ieee80211_tx.c
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@ -236,8 +236,12 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
};
u8 dest[ETH_ALEN], src[ETH_ALEN];
struct ieee80211_crypt_data *crypt;
int priority = skb->priority;
int snapped = 0;
if (ieee->is_queue_full && (*ieee->is_queue_full) (dev, priority))
return NETDEV_TX_BUSY;
spin_lock_irqsave(&ieee->lock, flags);
/* If there is no driver handler to take the TXB, dont' bother
@ -467,6 +471,14 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev)
stats->tx_bytes += txb->payload_size;
return 0;
}
if (ret == NETDEV_TX_BUSY) {
printk(KERN_ERR "%s: NETDEV_TX_BUSY returned; "
"driver should report queue full via "
"ieee_device->is_queue_full.\n",
ieee->dev->name);
}
ieee80211_txb_free(txb);
}