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Date: Sat, 08 Jan 2005 08:46:57 -0800
From: Mike Werner <werner@sgi.com>
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To: Dave Airlie <airlied@gmail.com>
CC: Benoit Boissinot <bboissin@gmail.com>, Andrew Morton <akpm@osdl.org>,
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Subject: Re: 2.6.10-mm2
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Dave Airlie wrote:
> 
> > > >
> > > > [drm:radeon_cp_init] *ERROR* radeon_cp_init called without lock held
> > > >
> > > > [drm:drm_unlock] *ERROR* Process 10657 using kernel context 0
> > > >
> > >
> > > this looks like the agp backend isn't loading, Mike sent me parts of
> > > your .config but I lost the mail (don't drink and read e-mail...)
> > >
> >
> 
> it looks like agp_backend_acquire is returning NULL in this case,
> [drm:drm_ioctl] pid=10587, cmd=0x6430, nr=0x30, dev 0xe200, auth=1
> [drm:drm_ioctl] ret = ffffffed
> is the agp acquire ioctl and the return is -ENODEV
> 
> Any ideas Mike why that might happen?
> 
> Dave.

If the bridge->agp_in_use is non-zero then drm_agp_acquire would return
-ENODEV.
Previously it would return -EBUSY in this case but agp_backend_acquire
now returns
a pointer to a bridge so there is no distinction made between existence
and busy.