radv: avoid GPU hangs if someone does a resolve with non-multisample src (v2)

This is a bug in the app, but I'd rather avoid hanging the GPU,
esp if someone is running in validation and it takes out their
development environment.

v2: get it right, reverse the polarity.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_meta_resolve.c

@@ -382,6 +382,11 @@ void radv_CmdResolveImage(
 	radv_meta_save_graphics_reset_vport_scissor_novertex(&saved_state, cmd_buffer);
 
 	assert(src_image->info.samples > 1);
+	if (src_image->info.samples <= 1) {
+		/* this causes GPU hangs if we get past here */
+		fprintf(stderr, "radv: Illegal resolve operation (src not multisampled), will hang GPU.");
+		return;
+	}
 	assert(dest_image->info.samples == 1);
 
 	if (src_image->info.samples >= 16) {