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authorJames Ketrenos <jketreno@linux.intel.com>2005-09-21 11:56:27 -0500
committerJeff Garzik <jgarzik@pobox.com>2005-09-21 23:03:54 -0400
commit2c0aa2a5c2dfa1293ae3a07517d0b7de149358a1 (patch)
treea9f949b6dc6a5e68086c06dfeb459a14608227a3
parent1264fc0498e1e20f97b1ab690e523e7a7fc50eab (diff)
[PATCH] ieee80211: Return NETDEV_TX_BUSY when QoS buffer full
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>
-rw-r--r--net/ieee80211/ieee80211_tx.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index 23a1f88de7cb..e9efdd42ba37 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -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);
}