VGA_SWITCHEROO_UNKNOWN_ID
enum vga_switcheroo_client_id client_id = VGA_SWITCHEROO_UNKNOWN_ID;
if (client_id == VGA_SWITCHEROO_UNKNOWN_ID)
#define client_is_vga(c) ((c)->id == VGA_SWITCHEROO_UNKNOWN_ID || \
if (client->id != VGA_SWITCHEROO_UNKNOWN_ID)
return register_client(pdev, ops, VGA_SWITCHEROO_UNKNOWN_ID,
enum vga_switcheroo_client_id client_id = VGA_SWITCHEROO_UNKNOWN_ID;
if (client_id == VGA_SWITCHEROO_UNKNOWN_ID)