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drm/i915: Also drop vm.ref along error paths for vma construction

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Not only do we need to release the vm.ref we acquired for the vma on the
duplicate insert branch, but also for the normal error paths, so roll
them all into one.

Reported-by: Andi Shyti <andi.shyti@intel.com>
Suggested-by: Andi Shyti <andi.shyti@intel.com>
Fixes: 2850748ef8 ("drm/i915: Pull i915_vma_pin under the vm->mutex")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Cc: <stable@vger.kernel.org> # v5.5+
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702211015.29604-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-07-02 22:10:15 +01:00
parent a85f22288d
commit 03fca66b7a
1 changed files with 6 additions and 10 deletions
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16
drivers/gpu/drm/i915/i915_vma.c
View File

@ -104,6 +104,7 @@ vma_create(struct drm_i915_gem_object *obj,
struct i915_address_space *vm,
const struct i915_ggtt_view *view)
{
struct i915_vma *pos = ERR_PTR(-E2BIG);
struct i915_vma *vma;
struct rb_node *rb, **p;
@ -184,7 +185,6 @@ vma_create(struct drm_i915_gem_object *obj,
rb = NULL;
p = &obj->vma.tree.rb_node;
while (*p) {
struct i915_vma *pos;
long cmp;
rb = *p;
@ -196,17 +196,12 @@ vma_create(struct drm_i915_gem_object *obj,
* and dispose of ours.
*/
cmp = i915_vma_compare(pos, vm, view);
if (cmp == 0) {
spin_unlock(&obj->vma.lock);
i915_vm_put(vm);
i915_vma_free(vma);
return pos;
}
if (cmp < 0)
p = &rb->rb_right;
else
else if (cmp > 0)
p = &rb->rb_left;
else
goto err_unlock;
}
rb_link_node(&vma->obj_node, rb, p);
rb_insert_color(&vma->obj_node, &obj->vma.tree);
@ -229,8 +224,9 @@ vma_create(struct drm_i915_gem_object *obj,
err_unlock:
spin_unlock(&obj->vma.lock);
err_vma:
i915_vm_put(vm);
i915_vma_free(vma);
return ERR_PTR(-E2BIG);
return pos;
}
static struct i915_vma *