linux-kernel - [51/80] drm/nv50: initialize ramht

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Date:	Fri, 24 Sep 2010 09:24:39 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Marcin Slusarz <marcin.slusarz@...il.com>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: [51/80] drm/nv50: initialize ramht_refs list for faked 0 channel

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Marcin Slusarz <marcin.slusarz@...il.com>

commit 615661f3948a066fd22a36fe8ea0c528b75ee373 upstream.

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@...il.com>
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/nouveau/nv50_instmem.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/nouveau/nv50_instmem.c
+++ b/drivers/gpu/drm/nouveau/nv50_instmem.c
@@ -141,6 +141,8 @@ nv50_instmem_init(struct drm_device *dev
 	chan->file_priv = (struct drm_file *)-2;
 	dev_priv->fifos[0] = dev_priv->fifos[127] = 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);


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