Re: btusb_intr_complete returns -EPIPE

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On Wed, 29 Oct 2014, Naveen Kumar Parna wrote:

> Split packet transactions are hidden. I could see them by clicking on
> the (Show/Hide Split transactions) button. For INT IN, I could see
> only Start Split packet.
> 
> I attached([2014-10-28 session 144012] Trace0003.rar) complete log for
> this scenario.

How come the log doesn't contain any SOF packets?

> SSPLIT IN transaction      114         1
> HS           No data                884.562 264 267
> 
> SSPLIT IN transaction      115         1
> HS           No data                884.562 265 217
> 
> SSPLIT IN transaction      116         1
> HS           No data                884.562 285 417
> 
> SSPLIT IN transaction      117         1
> HS           No data                884.562 286 467

I see what you mean -- the log doesn't contain any CSPLIT transactions 
for the interrupt endpoints.  Only SSPLIT.

I'll need to see the scheduling information for these endpoints.  
You'll have to run a 3.13 or later kernel; then the important files 
will be under /sys/kernel/debug/usb/ehci/X/, where X is the PCI address 
of the EHCI controller you are using.

Copy the files in that directory while the test is running.

Alan Stern

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