ata_scsi_user_scan — indication for user-initiated bus scan
int ata_scsi_user_scan
(struct Scsi_Host * shost, unsigned int channel, unsigned int id, unsigned int lun);
SCSI host to scan
Channel to scan
ID to scan
LUN to scan
This function is called when user explicitly requests bus scan. Set probe pending flag and invoke EH.
SCSI layer (we don't care)
Zero.