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/dma.c b/drivers/net/wireless/b43/dma.c
index 289aaf6dfe79..25ced8bdec8f 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -1387,7 +1387,6 @@ out_unlock:
         return err;
 }
 
-/* Called with IRQs disabled. */
 void b43_dma_handle_txstatus(struct b43_wldev *dev,
                              const struct b43_txstatus *status)
 {
@@ -1402,7 +1401,7 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
         if (unlikely(!ring))
                 return;
 
-        spin_lock(&ring->lock); /* IRQs are already disabled. */
+        spin_lock_irq(&ring->lock);
 
         B43_WARN_ON(!ring->tx);
         ops = ring->ops;
@@ -1463,7 +1462,7 @@ void b43_dma_handle_txstatus(struct b43_wldev *dev,
                 }
         }
 
-        spin_unlock(&ring->lock);
+        spin_unlock_irq(&ring->lock);
 }
 
 void b43_dma_get_tx_stats(struct b43_wldev *dev,