We need to make sure that userspace keeps on following the contract,
otherwise we won't be able to use the reserved fields at all.
v2: Add DRM_DEBUG (Chris)
Testcase: igt/gem_exec_params/*-dirt
Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index c7ef65c3ae91..b9dcc2869edc 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1123,6 +1123,11 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
ret = -EFAULT;
goto pre_mutex_err;
}
+ } else {
+ if (args->DR1 || args->DR4 || args->cliprects_ptr) {
+ DRM_DEBUG("0 cliprects but dirt in cliprects fields\n");
+ return -EINVAL;
+ }
}
intel_runtime_pm_get(dev_priv);
@@ -1400,6 +1405,11 @@ i915_gem_execbuffer2(struct drm_device *dev, void *data,
return -EINVAL;
}
+ if (args->rsvd2 != 0) {
+ DRM_DEBUG("dirty rvsd2 field\n");
+ return -EINVAL;
+ }
+
exec2_list = kmalloc(sizeof(*exec2_list)*args->buffer_count,
GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
if (exec2_list == NULL)
--
1.8.1.4
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