Re: usbfs and MAX_USBFS_BUFFER_SIZE

[Daniel Drake <dsd@xxxxxxxxxx>]

Pete Zaitcev wrote:
> On Sun, 02 Dec 2007 22:26:34 +0000, Daniel Drake <dsd@xxxxxxxxxx> wrote:
> 
>> Fair argument. I haven't actually tried sending a big urb through 
>> USBDEVFS_CONTROL but I noticed that MAX_USBFS_BUFFER_SIZE is not checked 
>> in that codepath. I wonder if something else in the chain will reject 
>> big control urbs.
> 
> But you did want it for something, didn't you?

Not exactly. I am writing a userspace USB I/O library (like libusb), and 
during testing I realised that I could not submit a bulk URB for ~110kb 
of data. While implementing the code to divide the request into several 
URBs, the thought "I wonder how this works for control URBs" crossed my 
mind. That's all :)

I published the source of my library yesterday:
http://www.reactivated.net/fprint/wiki/Fpusb

Daniel

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