rt2x00: Convert rt2x00 to use threaded interrupts

Use threaded interrupts for all rt2x00 PCI devices.

This has several generic advantages:
- Reduce the time we spend in hard irq context
- Use non-atmic mac80211 functions for rx/tx

Furthermore implementing broad- and multicast buffering will be
much easier in process context while maintaining low latency and
updating the beacon just before transmission (pre tbtt interrupt)
can also be done in process context.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 3 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 0906e14b347f..d3ebb4144562 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -340,9 +340,17 @@ void rt2x00lib_txdone(struct queue_entry *entry,
          * send the status report back.
          */
         if (!(skbdesc_flags & SKBDESC_NOT_MAC80211))
-                ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
+                /*
+                 * Only PCI and SOC devices process the tx status in process
+                 * context. Hence use ieee80211_tx_status for PCI and SOC
+                 * devices and stick to ieee80211_tx_status_irqsafe for USB.
+                 */
+                if (rt2x00_is_usb(rt2x00dev))
+                        ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
+                else
+                        ieee80211_tx_status(rt2x00dev->hw, entry->skb);
         else
-                dev_kfree_skb_irq(entry->skb);
+                dev_kfree_skb_any(entry->skb);
 
         /*
          * Make this entry available for reuse.
@@ -489,7 +497,16 @@ void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
          */
         rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
         memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
-        ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
+
+        /*
+         * Currently only PCI and SOC devices handle rx interrupts in process
+         * context. Hence, use ieee80211_rx_irqsafe for USB and ieee80211_rx_ni
+         * for PCI and SOC devices.
+         */
+        if (rt2x00_is_usb(rt2x00dev))
+                ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
+        else
+                ieee80211_rx_ni(rt2x00dev->hw, entry->skb);
 
         /*
          * Replace the skb with the freshly allocated one.