> The attached patch fixes it and solves my problem (when combined with
> http://lkml.org/lkml/2005/1/7/377). DRM is back with good performance.

Actually, this doesn't fix Benoit's problem (even if we were initially
having the same errors (radeon_cp_init called without lock held)).

It seems that memsetting the whole bridge structure to 0 (instead of
juste the agp_in_use field) fixes Benoit's problem too.
No idea which field was responsible for this. New patch attached.

Regards,
Brice