Re: High speed devices with kernel 2.6.21.5.
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 17 Jul 2007, Branden Sletteland wrote:
> With that code added I just see the print out for each of the four
> ports three times, and the device is not detected.
Try this patch instead.
Alan Stern
Index: 2.6.22/drivers/usb/host/ehci-hub.c
===================================================================
--- 2.6.22.orig/drivers/usb/host/ehci-hub.c
+++ 2.6.22/drivers/usb/host/ehci-hub.c
@@ -372,6 +372,13 @@ ehci_hub_status_data (struct usb_hcd *hc
/* port N changes (bit N)? */
spin_lock_irqsave (&ehci->lock, flags);
for (i = 0; i < ports; i++) {
+
+ /* Some HCs don't like to be jostled during a reset */
+ if (ehci->reset_done[i] &&
+ time_before(jiffies, ehci->reset_done[i])) {
+ printk("Skip status poll for port %d\n", i+1);
+ continue;
+ }
temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
/*
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