Re: usbtest test-14 failure: MUSBHDRC + Netchip2280

On Fri, 23 Mar 2007, Pandita, Vikram wrote:

> Hi 
> 
>   I am testing HS USB HOST controller of OMAP2430 (MUSBHDRC) with
> Netchip2280 device using usbtest. When I run the test.sh control test on
> the OMAP Host, the test 14 fails randomly after some iterations with
> error no -32.
> 
> When I analyze the CATC traces, when it fails, the NetChip2280 device
> STALLs the IN Token. Attached is the trace. It seems to be some timing
> related problem with the Netchip device rather than the host because the
> CATC trace does not show any misbehavior from Host side. 
> 
> Also when I add delays in either host or netchip driver, the problem
> goes away.
> 
>  The netchip driver is stalling the endpoint in the following place. 
> When I disable the STALL from netchip as follows, the problem vanishes,
> but that may not be the solution.
> 
> Could any one identify if this is netchip or host side issue? 

The problem you found may already have been fixed by this patch:

http://marc.info/?l=linux-usb-devel&m=116369017318210&w=2

At least, it touches the same code as your proposed change.  Can you see 
if it fixes your problem?

Alan Stern


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