b43: Use a threaded IRQ handler

Use a threaded IRQ handler to allow locking the mutex and
sleeping while executing an interrupt.
This removes usage of the irq_lock spinlock, but introduces
a new hardirq_lock, which is _only_ used for the PCI/SSB lowlevel
hard-irq handler. Sleeping busses (SDIO) will use mutex instead.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 3fd653c78b10..ce6f36eb88ca 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -570,7 +570,6 @@ out_unlock:
         return err;
 }
 
-/* Called with IRQs disabled. */
 void b43_pio_handle_txstatus(struct b43_wldev *dev,
                              const struct b43_txstatus *status)
 {
@@ -584,7 +583,7 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
                 return;
         B43_WARN_ON(!pack);
 
-        spin_lock(&q->lock); /* IRQs are already disabled. */
+        spin_lock_irq(&q->lock);
 
         info = IEEE80211_SKB_CB(pack->skb);
 
@@ -604,7 +603,7 @@ void b43_pio_handle_txstatus(struct b43_wldev *dev,
                 q->stopped = 0;
         }
 
-        spin_unlock(&q->lock);
+        spin_unlock_irq(&q->lock);
 }
 
 void b43_pio_get_tx_stats(struct b43_wldev *dev,