Hi Alan,
> The only reason I can think of why it might hang is if some clock got
> turned off. But I don't know of any clock which would have that
> effect, or which would get turned off before we reach this point.
>
> I also don't understand why the ehci_readl() would freeze when the
> preceding ehci_writel() succeeded. Can you try putting a copy of the
> ehci_readl() line just before the ehci_writel(), to see if it will work
> there?
Done:
printk(KERN_INFO "ehci_halt: about to readl prematurely\n");
temp = ehci_readl(ehci, &ehci->regs->command);
printk(KERN_INFO "ehci_halt: premature readl returned %x\n", temp);
/* disable any irqs left enabled by previous code */
ehci_writel(ehci, 0, &ehci->regs->intr_enable);
printk(KERN_INFO "ehci_halt: after first ehci_writel\n");
It works there. Result:
premature readl returned 10000
thanks and cheers,
Roland
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