[Intel-gfx] [PATCH] drm/i915: check i915_get_reset_stats_ioctl args

[Mika Kuoppala]

Insist that flags and pad fields are zero, so that
we can safely extend the interface in future.

Testcase: igt/gem_reset_stats/params

Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 drivers/gpu/drm/i915/intel_uncore.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 21cf951..a881906 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -641,6 +641,9 @@ int i915_get_reset_stats_ioctl(struct drm_device *dev,
 	struct i915_ctx_hang_stats *hs;
 	int ret;
 
+	if (args->flags || args->pad)
+		return -EINVAL;
+
 	if (args->ctx_id == DEFAULT_CONTEXT_ID && !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-- 
1.7.9.5