aboutsummaryrefslogtreecommitdiff
path: root/net/mac802154/rx.c
diff options
context:
space:
mode:
authorAlexander Aring <alex.aring@gmail.com>2014-10-27 17:13:30 +0100
committerMarcel Holtmann <marcel@holtmann.org>2014-10-27 18:07:40 +0100
commitc5c47e67bcd24638a059b1b5e9ec18c95f8634ca (patch)
treec57352e1df69afab550d8df129a0bee16b3455a7 /net/mac802154/rx.c
parent61a2281458956db519f2c24fa40bf277adea2a67 (diff)
downloadlinux-stericsson-c5c47e67bcd24638a059b1b5e9ec18c95f8634ca.tar.gz
mac802154: rx: use tasklet instead workqueue
Tasklets have much less overhead than workqueues. This patch also removes the heap allocation for the worker on receiving path. Like mac80211 we should prefer use a tasklet here instead a workqueue to getting fast out of interrupt context when ieee802154_rx_irqsafe is called by driver. Like wireless inside the tasklet context we should call netif_receive_skb instead netif_rx_ni anymore. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154/rx.c')
-rw-r--r--net/mac802154/rx.c48
1 files changed, 8 insertions, 40 deletions
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c
index 53c9e0c10a87..2851a3f7ac0b 100644
--- a/net/mac802154/rx.c
+++ b/net/mac802154/rx.c
@@ -19,7 +19,6 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/crc-ccitt.h>
@@ -28,30 +27,11 @@
#include "ieee802154_i.h"
-/* The IEEE 802.15.4 standard defines 4 MAC packet types:
- * - beacon frame
- * - MAC command frame
- * - acknowledgement frame
- * - data frame
- *
- * and only the data frame should be pushed to the upper layers, other types
- * are just internal MAC layer management information. So only data packets
- * are going to be sent to the networking queue, all other will be processed
- * right here by using the device workqueue.
- */
-struct rx_work {
- struct sk_buff *skb;
- struct work_struct work;
- struct ieee802154_hw *hw;
- u8 lqi;
-};
-
static void
-mac802154_subif_rx(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
+mac802154_subif_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
{
struct ieee802154_local *local = hw_to_local(hw);
- mac_cb(skb)->lqi = lqi;
skb->protocol = htons(ETH_P_IEEE802154);
skb_reset_mac_header(skb);
@@ -79,32 +59,20 @@ fail:
kfree_skb(skb);
}
-static void mac802154_rx_worker(struct work_struct *work)
+void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb)
{
- struct rx_work *rw = container_of(work, struct rx_work, work);
-
- mac802154_subif_rx(rw->hw, rw->skb, rw->lqi);
- kfree(rw);
+ mac802154_subif_rx(hw, skb);
}
+EXPORT_SYMBOL(ieee802154_rx);
void
ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
{
struct ieee802154_local *local = hw_to_local(hw);
- struct rx_work *work;
- if (!skb)
- return;
-
- work = kzalloc(sizeof(*work), GFP_ATOMIC);
- if (!work)
- return;
-
- INIT_WORK(&work->work, mac802154_rx_worker);
- work->skb = skb;
- work->hw = hw;
- work->lqi = lqi;
-
- queue_work(local->workqueue, &work->work);
+ mac_cb(skb)->lqi = lqi;
+ skb->pkt_type = IEEE802154_RX_MSG;
+ skb_queue_tail(&local->skb_queue, skb);
+ tasklet_schedule(&local->tasklet);
}
EXPORT_SYMBOL(ieee802154_rx_irqsafe);