From ea84c3f74df646a0897e95c78147190517a751a9 Mon Sep 17 00:00:00 2001 From: "James.Smart@Emulex.Com" Date: Wed, 10 Aug 2005 15:02:30 -0400 Subject: [PATCH] [SCSI] lpfc driver 8.0.30 : dev_loss and nodev timeouts Fix handling of the dev_loss and nodev timeouts. Symptoms: when remote port disappears for a period of time longer then either nodev_tmo or dev_loss_tmo, the lpfc driver worker thread will stall removing that remote port. Cause: removing remote port involves un-blocking and sync-ing corresponding block device queue. But corresponding node in the lpfc driver is still in the NPR(?node port recovery?) state and mid-layer gets SCSI_MLQUEUE_HOST_BUSY as a return value when it is trying to call queuecommand() with command for that node (AKA remote port) Fix: Instead of returning SCSI_MLQUEUE_HOST_BUS from queuecommand() for nodes in NPR states complete it with retry-able error code DID_BUS_BUSY Signed-off-by: James Smart Signed-off-by: James Bottomley --- drivers/scsi/lpfc/lpfc_scsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 15e747faaa5f..4be506a33a2e 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -753,6 +753,10 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) cmnd->result = ScsiResult(DID_NO_CONNECT, 0); goto out_fail_command; } + else if (ndlp->nlp_state == NLP_STE_NPR_NODE) { + cmnd->result = ScsiResult(DID_BUS_BUSY, 0); + goto out_fail_command; + } /* * The device is most likely recovered and the driver * needs a bit more time to finish. Ask the midlayer -- 2.39.5