Re: amd64 DRMKMS (ivy bridge) results, 14 Jun 2014

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

   Date: Fri, 15 Aug 2014 20:03:14 +0200
   From: Piotr Meyer <aniou%smutek.pl@localhost>

   On Thu, Aug 14, 2014 at 07:09:46PM +0200, Piotr Meyer wrote:
   > Ivy Bridge integrated GPU, fresh sources:
   > 
   > 1. Now, I got valid resolution on console and in X (1280x1024). 
   >    Much better. ;)
   > 
   > 2. glxgears leads to panic, after ddb.onpanic=1 I got:

   Some additional debug info, hope this helps a little:

The real problem here is that the GPU is hanging, and I don't know why
that is.  The panic you saw is due to a locking mistake which should
be easy to fix, but I haven't had time to identify all the relevant
code paths and do it.

Actually, it may suffice to just omit the call to DRM_SPIN_WAITERS_P
altogether -- I'm not sure anything important relies on the result.