Re: [PATCH 5/7] usb: gadget: fsl_udc: postpone freeing current dTD

On Fri, Oct 19, 2012 at 12:24:43PM +0200, Christoph Fritz wrote:

USB controller may access a wrong address for the dTD (endpoint transfer
descriptor) and then hang. This happens a lot when doing tests with
g_ether module and iperf, a tool for measuring maximum TCP and UDP
bandwidth.

This hardware bug is explained in detail by errata number 2858 for i.MX23:
http://cache.freescale.com/files/dsp/doc/errata/IMX23CE.pdf

All (?) SOCs with an IP from chipidea suffer from this problem.
mv_udc_core fixes this bug by commit daec765.  There still may be
unfixed drivers.

why aren't you using that driver instead ? Is it really necessary to
keep this driver around ? I would really like to see uniformization
towards that, if you use the same IP, then the same driver ought to
suffice.

What's the reason for not using drivers/usb/chipidea ?

-- 
balbi