drm/i915: Correctly reject invalid flags for wait_ioctl

Not having checks for this isn't good.

I've checked igt and libdrm and they all already clear flags properly.
So we're lucky and should be able to sneak this ABI clarification in.

Testcase: igt/gem_wait/invalid-flags
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85280
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 895f9881f0aa899b4850888606dbd1e3d2879564..827edb5898832e98465cf63fdceaf82cf828d556 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2810,6 +2810,9 @@ i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
        u32 seqno = 0;
        int ret = 0;
 
+       if (args->flags != 0)
+               return -EINVAL;
+
        ret = i915_mutex_lock_interruptible(dev);
        if (ret)
                return ret;