On Thu, 22 Oct 2009, [UTF-8] Ozan Ã?aÄ?layan wrote:
> Here's the outputs from /sys/kernel/debug/usb/ehci:
>
> periodic:
> ----------------
> size = 1024
> 1: qh1024-0001/f6ffe280 (h2 ep2 [1/0] q0 p8)
There's something odd about this. I'd like to see this file again,
after the patch below has been applied.
> registers:
> ----------------
> bus pci, device 0000:00:1d.7
> EHCI Host Controller
> EHCI 1.00, hcd state 0
> ownership 00000001
> SMI sts/enable 0x80080000
> structural params 0x00104208
> capability params 0x00016871
> status 6008 Periodic Recl FLR
> command 010000 (park)=0 ithresh=1 period=1024 HALT
> intrenable 00
> uframe 2fa0
> port 1 status 001000 POWER sig=se0
> port 2 status 001000 POWER sig=se0
> port 3 status 001000 POWER sig=se0
> port 4 status 001000 POWER sig=se0
> port 5 status 001005 POWER sig=se0 PE CONNECT
> port 6 status 001005 POWER sig=se0 PE CONNECT
> port 7 status 001000 POWER sig=se0
> port 8 status 001000 POWER sig=se0
> irq normal 60 err 0 reclaim 16 (lost 0)
> complete 60 unlink 1
This confirms that the periodic schedule was never disabled.
So first get another copy of the "periodic" file with the patch below.
Then try changing the enable_periodic() routine in ehci-sched.c: Add
udelay(2000);
just before the final "return 0;" line. Let's see if that prevents the
problem from occurring.
Alan Stern
--- usb-2.6.orig/drivers/usb/host/ehci-dbg.c
+++ usb-2.6/drivers/usb/host/ehci-dbg.c
@@ -591,18 +591,21 @@ static ssize_t fill_periodic_buffer(stru
qtd->hw_token) >> 8)) {
case 0: type = "out"; continue;
case 1: type = "in"; continue;
+ case 2: type = "?2"; continue;
+ case 3: type = "?3"; continue;
}
}
temp = scnprintf (next, size,
" (%c%d ep%d%s "
- "[%d/%d] q%d p%d)",
+ "[%d/%d] q%d p%d) %08x",
speed_char (scratch),
scratch & 0x007f,
(scratch >> 8) & 0x000f, type,
p.qh->usecs, p.qh->c_usecs,
temp,
- 0x7ff & (scratch >> 16));
+ 0x7ff & (scratch >> 16),
+ hc32_to_cpu(ehci, qtd->hw_token));
if (seen_count < DBG_SCHED_LIMIT)
seen [seen_count++].qh = p.qh;
--
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