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drm/i915/gvt: fix a bounds check in ring_id_to_context_switch_event()

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There are two bugs here.  The && should be || and the > is off by one so
it should be >= ARRAY_SIZE().

Fixes: 8453d674ae ("drm/i915/gvt: vGPU execlist virtualization")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Dan Carpenter 2017-04-13 22:48:28 +03:00 committed by Zhenyu Wang
parent 5ad59bf096
commit c821ee6d2b
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/gvt/execlist.c
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@ -56,8 +56,8 @@ static int context_switch_events[] = {
static int ring_id_to_context_switch_event(int ring_id)
{
if (WARN_ON(ring_id < RCS && ring_id >
ARRAY_SIZE(context_switch_events)))
if (WARN_ON(ring_id < RCS ||
ring_id >= ARRAY_SIZE(context_switch_events)))
return -EINVAL;
return context_switch_events[ring_id];