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List:       linux-usb-devel
Subject:    Re: [linux-usb-devel] GadgetFS Single Threaded
From:       David Brownell <david-b () pacbell ! net>
Date:       2007-02-28 20:27:10
Message-ID: 200702281227.10623.david-b () pacbell ! net
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On Wednesday 28 February 2007 10:09 am, Andreas Vilinski wrote:
> Hi
> 
> I try to implement a mass storage gadget driver in user space. The  
> restriction - it must be single threaded.
> The usb.c example, that uses the gadgetfs module has two trehads running.  
> But it's currently possible to poll the EP0 and submit IO-writes to EP-IN  
> and EP-OUT Endpoints. Is it possible to write single-threaded applications  
> based on gadgetfs? It seems to me very useless to apply the different  
> approaches to different endpoint file descriptors

I think that some patches have been merged which would make it possible
to write single-threaded code like that.

It certainly _should_ be possible.  The example program started as more
of a test driver than anything else.  So ... try it, and if you find any
bugs, report them (ideally, with patches to fix the problem).

- Dave

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