From c53f225fd792970c75ce0cb4042a11d04ef06d09 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 21 Mar 2018 15:08:47 +0100 Subject: [PATCH] drm/i915/gvt: throw error on unhandled vfio ioctls commit 9f591ae60e1be026901398ef99eede91237aa3a1 upstream. On unknown/unhandled ioctls the driver should return an error, so userspace knows it tried to use something unsupported. Cc: stable@vger.kernel.org Signed-off-by: Gerd Hoffmann Reviewed-by: Alex Williamson Signed-off-by: Zhenyu Wang Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c index 83e88c7..9bf4045 100644 --- a/drivers/gpu/drm/i915/gvt/kvmgt.c +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c @@ -1153,7 +1153,7 @@ static long intel_vgpu_ioctl(struct mdev_device *mdev, unsigned int cmd, return 0; } - return 0; + return -ENOTTY; } static ssize_t -- 2.7.4