[PATCH] drm/i915/gvt: add return error to cmd_reg_handler

[Tina Zhang]

cmd_reg_handler should return -EINVAL when error occurs.

Signed-off-by: Tina Zhang <tina.zhang at intel.com>

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index 7a5d7f5..bb82b77 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -832,13 +832,13 @@ static int cmd_reg_handler(struct parser_exec_state *s,
 	if (!intel_gvt_mmio_is_cmd_access(gvt, offset)) {
 		gvt_err("vgpu%d: %s access to non-render register (%x)\n",
 				s->vgpu->id, cmd, offset);
-		return 0;
+		return -EINVAL;
 	}
 
 	if (is_shadowed_mmio(offset)) {
 		gvt_err("vgpu%d: found access of shadowed MMIO %x\n",
 				s->vgpu->id, offset);
-		return 0;
+		return -EINVAL;
 	}
 
 	if (offset == i915_mmio_reg_offset(DERRMR) ||
-- 
1.9.1