4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gerd Hoffmann <kra...@redhat.com>
commit 9f591ae60e1be026901398ef99eede91237aa3a1 upstream.
On unknown/unhandled ioctls the driver should return an error, so
userspace knows it tried to use something unsupported.
Cc: sta...@vger.kernel.org
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
Reviewed-by: Alex Williamson <alex.william...@redhat.com>
Signed-off-by: Zhenyu Wang <zhen...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1284,7 +1284,7 @@ static long intel_vgpu_ioctl(struct mdev
}
- return 0;
+ return -ENOTTY;
}
static ssize_t
