Re: Resuming rt73usb wireless network dongle: ep0in 3strikes

On Tue, 2007-09-04 at 10:30 -0400, Alan Stern wrote:
> On Tue, 4 Sep 2007, Mattias Nissler wrote:
> 
> > > > And how does CONFIG_USB_PERSIST relate to all that?
> > > 
> > > It doesn't come into effect unless the host controller driver
> > > recognizes at resume time that power was lost, which apparently didn't
> > > happen.  There were no "root hub lost power" messages in the log.
> > 
> > Ok, can you give me some pointers where in the usb code this is to be
> > detected and handled? I'll try to debug this, but I haven't worked with
> > the USB subsystem before, so any help I can get is welcome ;-)
> 
> It starts in drivers/usb/host/ehci-pci.c, in ehci_pci_resume().  Look 
> at the test for whether or not FLAG_CF is still set.
> 
> But first we need to check out the USB debugging log.  It will tell us 
> whether or not this code is relevant.

Ok, it's here:
http://www-user.rhrk.uni-kl.de/~nissler/rt73usb_sr/syslog_suspend_to_disk_2.txt

Seems there are some more messages.

For example:

Sep  4 18:59:22 kea ehci_hcd 0000:00:1d.7: resume root hub

which is from ehci_pci_resume(). And it does *not* say "after power
loss". I think this is correct ;-)

So what else happens there?

Mattias


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