patches/09-threaded-irq.patch

   1 The 2.6.31 kernel has threaded IRQ support and b43 is the first
   2 wireless driver that makes use of it. To support threaded IRSs
   3 on older kernels we built our own struct compat_threaded_irq
   4 to queue_work() onto it as the kernel thread be running the
   5 thread in process context as well.
   6
   7 --- a/drivers/net/wireless/b43/main.c
   8 +++ b/drivers/net/wireless/b43/main.c
   9 @@ -3915,8 +3915,13 @@ redo:
  10         if (dev->dev->bus->bustype == SSB_BUSTYPE_SDIO) {
  11                 b43_sdio_free_irq(dev);
  12         } else {
  13 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
  14 +               compat_synchronize_threaded_irq(&dev->irq_compat);
  15 +               compat_free_threaded_irq(&dev->irq_compat);
  16 +#else
  17                 synchronize_irq(dev->dev->irq);
  18                 free_irq(dev->dev->irq, dev);
  19 +#endif
  20         }
  21         mutex_lock(&wl->mutex);
  22         dev = wl->current_dev;
  23 @@ -3956,9 +3961,17 @@ static int b43_wireless_core_start(struc
  24                         goto out;
  25                 }
  26         } else {
  27 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
  28 +               err = compat_request_threaded_irq(&dev->irq_compat,
  29 +                                                 dev->dev->irq,
  30 +                                                 b43_interrupt_handler,
  31 +                                                 b43_interrupt_thread_handler,
  32 +                                                 IRQF_SHARED, KBUILD_MODNAME, dev);
  33 +#else
  34                 err = request_threaded_irq(dev->dev->irq, b43_interrupt_handler,
  35                                            b43_interrupt_thread_handler,
  36                                            IRQF_SHARED, KBUILD_MODNAME, dev);
  37 +#endif
  38                 if (err) {
  39                         b43err(dev->wl, "Cannot request IRQ-%d\n", dev->dev->irq);
  40                         goto out;
  41 @@ -4663,6 +4676,10 @@ static int b43_setup_bands(struct b43_wl
  42
  43  static void b43_wireless_core_detach(struct b43_wldev *dev)
  44  {
  45 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
  46 +       if (dev->dev->bus->bustype != SSB_BUSTYPE_SDIO)
  47 +               compat_destroy_threaded_irq(&dev->irq_compat);
  48 +#endif
  49         /* We release firmware that late to not be required to re-request
  50          * is all the time when we reinit the core. */
  51         b43_release_firmware(dev);
  52 --- a/drivers/net/wireless/b43/b43.h
  53 +++ b/drivers/net/wireless/b43/b43.h
  54 @@ -754,6 +754,9 @@ struct b43_wldev {
  55         unsigned int tx_count;
  56         unsigned int rx_count;
  57  #endif
  58 +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
  59 +       struct compat_threaded_irq irq_compat;
  60 +#endif
  61  };
  62
  63  /* Data structure for the WLAN parts (802.11 cores) of the b43 chip. */