All files in /sys/class/pcmcia_socket/pcmcia_socket0/* are unreadable
without a card inserted:
read(3, 0x9167858, 4096) = -1 ENODEV (No such device)
So we need to skip that step for now.
{ .subsystem = "net", .file = "ifindex" },
{ .subsystem = "scsi_host", .file = "unique_id" },
{ .subsystem = "scsi_device", .file = NULL },
{ .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 },
{ .subsystem = "usb_host", .file = NULL },
{ .subsystem = "bluetooth", .file = "address" },
{ .subsystem = "i2c-adapter", .file = NULL },