Re: Help needed for EHCI problem: removing an active bulk-in QH

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On Mon, 2 Nov 2015, Michael Reutman wrote:

> On Wed, Oct 28, 2015 at 10:48 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> > The patch below is meant to apply on top of the previous patch.  It's a
> > quick-and-dirty workaround which ought to prevent the problem from
> > occurring.  Let's see if it does.
> 
> Unfortunately, I have some bad news. It appears that the last patch
> just pushes the issue further on down in time. Ran the test fresh
> today and usb got "stuck" in around 15 to 20 minutes. This has
> definitely improved things from before where it took less than a
> minute to get everything out of sorts, so maybe we are on the right
> track?

Okay, I was afraid of that.  I'll have something else for you to try in 
a few days; things are a little busy here right now.

> I captured dmesg and async output as previous and have attached them below.
> 
> Also, should I still be enabling usbfs_snoop and usbfs_snoop_max
> still? I tried it with and without those enabled just to see if they
> made a difference, but they appear to end in the same state in
> approximately the same amount of time.

At this point they don't really matter any more.

Alan Stern

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