On Sun, 2011-07-31 at 16:15 +0200, Remy Bohmer wrote:

As alternative solution I can do the following as well:
The driver now has a tasklet used for processing the queue. If I add
IRQF_NO_THREAD as irq-flag, the thread is not created and the handler
runs completely in hard-irq context. This seems to work okay, but it
does not feel as the right solution.

How is this supposed to work? Do you have better ideas how to solve
situations like this? 

This sounds like the total trainwreck known as tty/console, I believe
jwessel and tglx had some ideas on that. Maybe Jason can share what he
knows, I'm not up to speed on that issue.