Problem with non aligned DMA in usbnet on ARM

On Wed, Aug 11, 2010 at 12:11:52PM +0200, Martin Fuzzey wrote:

quoted

You haven't said what HCD you're using.

imx21_hcd  (submitted by me and mainlined in 2.6.34)

quoted

In that case, I'd say the HCD must handle misaligned URBs itself so
behaviour is consistent between all implementations on different
platforms.

Here is a pointer to the thread where it was stated that HCD's don't
have to handle this.

http://kerneltrap.org/mailarchive/linux-usb/2009/4/20/5528164

No, that thread is about stack vs. heap allocations, not about alignment
issues.

thanks,

greg k-h