{ .subsystem = "net", .file = "ifindex" },
{ .subsystem = "scsi_host", .file = "unique_id" },
{ .subsystem = "scsi_device", .file = NULL },
- { .subsystem = "pcmcia_socket", .file = "card_type" },
+ { .subsystem = "pcmcia_socket", .file = NULL }, /* all files are unreadable in empty slot :( */
{ .subsystem = "usb_host", .file = NULL },
{ .subsystem = "bluetooth", .file = "address" },
{ .subsystem = "i2c-adapter", .file = NULL },