target/linux/aruba-2.6/patches/012-ehci_softirq.patch

   1 diff -Nurb linux-2.6.16.1/drivers/usb/host/ehci.h linux-patched/drivers/usb/host/ehci.h
   2 --- linux-2.6.16.1/drivers/usb/host/ehci.h      2006-03-27 22:49:02.000000000 -0800
   3 +++ linux-patched/drivers/usb/host/ehci.h       2006-04-07 12:07:30.000000000 -0700
   4 @@ -82,6 +82,7 @@
   5         struct dma_pool         *sitd_pool;     /* sitd per split iso urb */
   6
   7         struct timer_list       watchdog;
   8 +       struct timer_list       softirq;
   9         unsigned long           actions;
  10         unsigned                stamp;
  11         unsigned long           next_statechange;
  12 diff -Nurb linux-2.6.16.1/drivers/usb/host/ehci-hcd.c linux-patched/drivers/usb/host/ehci-hcd.c
  13 --- linux-2.6.16.1/drivers/usb/host/ehci-hcd.c  2006-03-27 22:49:02.000000000 -0800
  14 +++ linux-patched/drivers/usb/host/ehci-hcd.c   2006-04-07 13:20:13.000000000 -0700
  15 @@ -116,6 +116,7 @@
  16  #define EHCI_IO_JIFFIES                (HZ/10)         /* io watchdog > irq_thresh */
  17  #define EHCI_ASYNC_JIFFIES     (HZ/20)         /* async idle timeout */
  18  #define EHCI_SHRINK_JIFFIES    (HZ/200)        /* async qh unlink delay */
  19 +#define EHCI_SOFTIRQ           (HZ/400)
  20
  21  /* Initial IRQ latency:  faster than hw default */
  22  static int log2_irq_thresh = 0;                // 0 to 6
  23 @@ -263,6 +264,16 @@
  24  #include "ehci-sched.c"
  25
  26  /*-------------------------------------------------------------------------*/
  27 +static irqreturn_t ehci_irq (struct usb_hcd *hcd);
  28 +
  29 +static void ehci_softirq (unsigned long param)
  30 +{
  31 +       struct ehci_hcd         *ehci = (struct ehci_hcd *) param;
  32 +
  33 +       if (ehci_irq(ehci_to_hcd(ehci)) != IRQ_NONE)
  34 +               set_bit(HCD_FLAG_SAW_IRQ, &(ehci_to_hcd(ehci))->flags);
  35 +       mod_timer (&ehci->softirq, jiffies + EHCI_SOFTIRQ);
  36 +}
  37
  38  static void ehci_watchdog (unsigned long param)
  39  {
  40 @@ -280,6 +291,10 @@
  41                         COUNT (ehci->stats.lost_iaa);
  42                         writel (STS_IAA, &ehci->regs->status);
  43                         ehci->reclaim_ready = 1;
  44 +                       if (!timer_pending(&ehci->softirq)) {
  45 +                               ehci_info(ehci, "switching to softirq\n");
  46 +                               mod_timer (&ehci->softirq, jiffies + EHCI_SOFTIRQ);
  47 +                       }
  48                 }
  49         }
  50
  51 @@ -371,6 +388,7 @@
  52
  53         /* no more interrupts ... */
  54         del_timer_sync (&ehci->watchdog);
  55 +       del_timer_sync (&ehci->softirq);
  56
  57         spin_lock_irq(&ehci->lock);
  58         if (HC_IS_RUNNING (hcd->state))
  59 @@ -418,6 +436,10 @@
  60         ehci->watchdog.function = ehci_watchdog;
  61         ehci->watchdog.data = (unsigned long) ehci;
  62
  63 +       init_timer(&ehci->softirq);
  64 +       ehci->softirq.function = ehci_softirq;
  65 +       ehci->softirq.data = (unsigned long) ehci;
  66 +
  67         /*
  68          * hw default: 1K periodic list heads, one per frame.
  69          * periodic_size can shrink by USBCMD update if hcc_params allows.
  70