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diff -Nurb linux-2.6.16.1/drivers/usb/host/ehci.h linux-patched/drivers/usb/host/ehci.h
--- linux-2.6.16.1/drivers/usb/host/ehci.h 2006-03-27 22:49:02.000000000 -0800
+++ linux-patched/drivers/usb/host/ehci.h 2006-04-07 12:07:30.000000000 -0700
@@ -82,6 +82,7 @@
struct dma_pool *sitd_pool; /* sitd per split iso urb */
struct timer_list watchdog;
+ struct timer_list softirq;
unsigned long actions;
unsigned stamp;
unsigned long next_statechange;
diff -Nurb linux-2.6.16.1/drivers/usb/host/ehci-hcd.c linux-patched/drivers/usb/host/ehci-hcd.c
--- linux-2.6.16.1/drivers/usb/host/ehci-hcd.c 2006-03-27 22:49:02.000000000 -0800
+++ linux-patched/drivers/usb/host/ehci-hcd.c 2006-04-07 13:20:13.000000000 -0700
@@ -116,6 +116,7 @@
#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */
+#define EHCI_SOFTIRQ (HZ/400)
/* Initial IRQ latency: faster than hw default */
static int log2_irq_thresh = 0; // 0 to 6
@@ -263,6 +264,16 @@
#include "ehci-sched.c"
/*-------------------------------------------------------------------------*/
+static irqreturn_t ehci_irq (struct usb_hcd *hcd);
+
+static void ehci_softirq (unsigned long param)
+{
+ struct ehci_hcd *ehci = (struct ehci_hcd *) param;
+
+ if (ehci_irq(ehci_to_hcd(ehci)) != IRQ_NONE)
+ set_bit(HCD_FLAG_SAW_IRQ, &(ehci_to_hcd(ehci))->flags);
+ mod_timer (&ehci->softirq, jiffies + EHCI_SOFTIRQ);
+}
static void ehci_watchdog (unsigned long param)
{
@@ -280,6 +291,10 @@
COUNT (ehci->stats.lost_iaa);
writel (STS_IAA, &ehci->regs->status);
ehci->reclaim_ready = 1;
+ if (!timer_pending(&ehci->softirq)) {
+ ehci_info(ehci, "switching to softirq\n");
+ mod_timer (&ehci->softirq, jiffies + EHCI_SOFTIRQ);
+ }
}
}
@@ -371,6 +388,7 @@
/* no more interrupts ... */
del_timer_sync (&ehci->watchdog);
+ del_timer_sync (&ehci->softirq);
spin_lock_irq(&ehci->lock);
if (HC_IS_RUNNING (hcd->state))
@@ -418,6 +436,10 @@
ehci->watchdog.function = ehci_watchdog;
ehci->watchdog.data = (unsigned long) ehci;
+ init_timer(&ehci->softirq);
+ ehci->softirq.function = ehci_softirq;
+ ehci->softirq.data = (unsigned long) ehci;
+
/*
* hw default: 1K periodic list heads, one per frame.
* periodic_size can shrink by USBCMD update if hcc_params allows.
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