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drm/i915: Only unpin the default ctx object if it exists

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Since commit 691e6415c8
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>
This commit is contained in:
Chris Wilson 2014-05-16 18:59:00 +01:00 committed by Daniel Vetter
parent 823c690958
commit d3b448d991
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_gem_context.c
View file

@ -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);
}