[Nouveau] [PATCH] drm/nv50: initialize ramht_refs list for faked 0 channel
skeggsb at gmail.com
Thu Sep 2 05:31:55 PDT 2010
On Thu, 2010-09-02 at 12:45 +0200, Marcin Slusarz wrote:
> On Wed, Sep 01, 2010 at 07:52:58AM +1000, Ben Skeggs wrote:
> > On Tue, 2010-08-31 at 23:22 +0200, Marcin Slusarz wrote:
> > > On Sun, Aug 22, 2010 at 08:54:08PM +0200, Marcin Slusarz wrote:
> > > > We need it for PFIFO_INTR_CACHE_ERROR interrupt handling,
> > > > because nouveau_fifo_swmthd looks for matching gpuobj in
> > > > ramht_refs list.
> > > > It fixes kernel panic in nouveau_gpuobj_ref_find.
> > > >
> > > > Signed-off-by: Marcin Slusarz <marcin.slusarz at gmail.com>
> > > > ---
> > > > drivers/gpu/drm/nouveau/nv50_instmem.c | 2 ++
> > > > 1 files changed, 2 insertions(+), 0 deletions(-)
> > > >
> > > > diff --git a/drivers/gpu/drm/nouveau/nv50_instmem.c b/drivers/gpu/drm/nouveau/nv50_instmem.c
> > > > index b57cc4a..6e57426 100644
> > > > --- a/drivers/gpu/drm/nouveau/nv50_instmem.c
> > > > +++ b/drivers/gpu/drm/nouveau/nv50_instmem.c
> > > > @@ -139,6 +139,8 @@ nv50_instmem_init(struct drm_device *dev)
> > > > chan->file_priv = (struct drm_file *)-2;
> > > > dev_priv->fifos = dev_priv->fifos = chan;
> > > >
> > > > + INIT_LIST_HEAD(&chan->ramht_refs);
> > > > +
> > > > /* Channel's PRAMIN object + heap */
> > > > ret = nouveau_gpuobj_new_fake(dev, 0, c_offset, c_size, 0,
> > > > NULL, &chan->ramin);
> > > > --
> > >
> > > ping
> > Pong! Thank you for the patch.
> > I meant to reply to this earlier but it slipped my mind. I have a
> > number of pending cleanups to all this stuff that should make this patch
> > unnecessary.
> Oh, come on. It's a simple one-line bugfix for easily triggerable kernel panic.
> Patch like this should not wait a week for any response - it should be applied
> ASAP and go to Linus possibly with -stable tag.
Oh please, it's hardly easily triggerable. I've *never* seen it
personally, and triggering errors on those channels isn't something that
generally happens. If you feel that strongly about it I'll send it to
Dave to go to Linus.
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