Re: regression with 8e8dce065088833fc418bfa5fbf035cb0726c04c: USB: use kfifo to buffer usb-generic serial writes

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On Mon, Jul 26, 2010 at 03:57:15PM +0200, Alexander Stein wrote:
> Hello,
> 
> recently I noticed, using a 2.6.34 linux kernel, that the sam-ba tool from 
> Atmel doesn't work anymore. It can be used to program storage device using an 
> AT91 controller. To use it, you need to run 'modprobe usbserial vendor=0x03eb 
> product=0x6124' (See also 
> http://www.at91.com/linux4sam/bin/view/Linux4SAM/SoftwareTools for more 
> information)

Ick, the generic driver?  What a mess...

> Several linux version ago (up to 2.6.31 in fact) I could use this tool to 
> connect to my boards and program them. But now I'm running a 2.6.34 kernel 
> where this doesn't work anymore. I git bisected into this problem and found 
> out the problem arises with the commit 
> 8e8dce065088833fc418bfa5fbf035cb0726c04c: USB: use kfifo to buffer usb-generic 
> serial writes
> Using this tool after the named commit it initially connects to the board and 
> gets stuck on downloading a program.
> Any ideas how to fix it? Feel free to ask any question unclear about this 
> problem.

David, care to work on fixing this up?

Alexander, does the 2.6.35-rc6 kernel also have this problem?

thanks,

greg k-h
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