linux-kernel - [PATCH 3.8 53/91] drm/vmwgfx: Don't put resources with invalid id's on lru list

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Message-Id: <1383876946-2396-54-git-send-email-kamal@canonical.com>
Date:	Thu,  7 Nov 2013 18:15:08 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Thomas Hellstrom <thellstrom@...are.com>,
	Dave Airlie <airlied@...hat.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.8 53/91] drm/vmwgfx: Don't put resources with invalid id's on lru list

3.8.13.13 -stable review patch.  If anyone has any objections, please let me know.

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

From: Thomas Hellstrom <thellstrom@...are.com>

commit 26682480c202e7360cbcdc3bc9e962bf749c6b8d upstream.

The evict code may try to swap them out causing a BUG in the destroy
function.

Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
Reviewed-by: Jakob Bornecrantz <jakob@...are.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index e01a17b..6453029 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -971,7 +971,7 @@ void vmw_resource_unreserve(struct vmw_resource *res,
 	if (new_backup)
 		res->backup_offset = new_backup_offset;
 
-	if (!res->func->may_evict)
+	if (!res->func->may_evict || res->id == -1)
 		return;
 
 	write_lock(&dev_priv->resource_lock);
-- 
1.8.1.2

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