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drm/i915: Unwind conversion to i915_gem_phys_ops on failure 

The physical object is treated as permanently pinned. If we fail to take
this initial pin during i915_gem_object_attach_phys() we need to revert
it back to an ordinary shmemfs object before reporting the failure.

v2: git-add

Reported-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215163900.11606-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson 2017-02-15 16:39:00 +00:00
parent c1d2061b28
commit 581ab1fe52
1 changed files with 12 additions and 1 deletions
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13
drivers/gpu/drm/i915/i915_gem.c
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@ -313,6 +313,8 @@ static const struct drm_i915_gem_object_ops i915_gem_phys_ops = {
.release = i915_gem_object_release_phys,
};
static const struct drm_i915_gem_object_ops i915_gem_object_ops;
int i915_gem_object_unbind(struct drm_i915_gem_object *obj)
{
struct i915_vma *vma;
@ -586,9 +588,18 @@ i915_gem_object_attach_phys(struct drm_i915_gem_object *obj,
if (obj->mm.pages)
return -EBUSY;
GEM_BUG_ON(obj->ops != &i915_gem_object_ops);
obj->ops = &i915_gem_phys_ops;
return i915_gem_object_pin_pages(obj);
ret = i915_gem_object_pin_pages(obj);
if (ret)
goto err_xfer;
return 0;
err_xfer:
obj->ops = &i915_gem_object_ops;
return ret;
}
static int