Running with 2.6.13, an EMC Symmetrix target with lpfc and getting into a deadlock when the target port times out WHILE starting to scan the port via fc_scsi_scan_rport. The lpfc_worker thread is stuck waiting for the scsi host's work_q to empty in scsi_flush_work. But this work queue wont empty since the inquiry to LUN 0 initiated by the fc_scsi_scan_rport port scan is getting retried onto the scsi mid-level request queue, seemingly ad infinitum, since lpfc_queuecommand is returning SCSI_MLQUEUE_HOST_BUSY whenever a target port infrastructure is being dismantled. This prevents the fc_scsi_scan_rport call from finishing which prevents the target's NODEV timeout from being completely serviced. My boot up hangs as a result. Not clear yet why the timeout is happening in the first place. This problem is occurring for about 70% of my reboots :(( - : 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
