Can somebody explain the reason for calling a separate scsi_sysfs_add_devices() routine in the async scanning code instead of just calling scsi_sysfs_add_sdev() normally from within scsi_add_lun()? This peculiar delayed approach has introduced a bug. It evades the protection provided by shost->scan_mutex and as a result, if a host is hot-unplugged in the middle of an async scan, the SCSI core will attempt to unregister the host's devices before they have been registered! Obviously this is not good. There are at least two reports filed in the kernel.org bugilla showing this bug: #8840 and #8846. Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
