From d3b448d9917a3d6531e499d88bfb13ea5e31e4ad Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 16 May 2014 18:59:00 +0100
Subject: [PATCH] drm/i915: Only unpin the default ctx object if it exists
Since commit 691e6415c891b8b2b082a120b896b443531c4d45
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed Apr 9 09:07:36 2014 +0100
drm/i915: Always use kref tracking for all contexts.
we have contexts everywhere, and so we must be careful to distinguish
fake contexts, which do not have an associated bo, and real ones, which
do. In particular, we now need to be careful not to dereference NULL
pointers.
This is one such example, as the commit highlighted above failed to move
the unpinning of the default ctx object into the real-context-only
branch.
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78792
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/i915_gem_context.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index f7ad59e71b36..50875f5d0c88 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -449,6 +449,8 @@ void i915_gem_context_fini(struct drm_device *dev)
i915_gem_context_unreference(dctx);
dev_priv->ring[RCS].last_context = NULL;
}
+
+ i915_gem_object_ggtt_unpin(dctx->obj);
}
for (i = 0; i < I915_NUM_RINGS; i++) {
@@ -461,7 +463,6 @@ void i915_gem_context_fini(struct drm_device *dev)
ring->last_context = NULL;
}
- i915_gem_object_ggtt_unpin(dctx->obj);
i915_gem_context_unreference(dctx);
}
--
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